Would calling someone a Swede be racist to the Swedish? Would calling someone a Rus be racist towards Russians? Would calling someone a Can be racist to Canadians? Even if you were so thin-skinned to say yes to all of those, you'd still be wrong because nationalism =/= racism.
La religion est fausse, mais vous tes rel.

Who made people believe "Jap" is a racial slur? Was it a random Japanese person in a western society asking not to use "Jap" because it's offensive? I highly doubt about that. One thing is sure that it's one of those "white guilt" thing. It's somehow really wrong to kill Japanese people with atomic bombs while millions of American soldiers killed by Japanese soldiers.

japanese is no more a race than british is. jap is no more racist than brit.
even if it is being used in a derogatory manner it would be xenophobic not racist.

^^^^^^
I like the way you think.
"check the imdb cast list before asking who portrayed who in movies please"

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Nip is more offensive. "It's hip to eat nip." The Odd Couple

We want realism in our historical movies but we complain when real actual dialogue of the times like this are in the movie? So which is it folks, you can't have it both ways. Okay, so it's a racial slur, great. Now what? Some of you say it like you'd prefer these movies get censored to your standard of political correctness or something. Sorry, I can't get on board with that.
The fact is, people said "Japs" a lot back in the early 40's. Deal with it. At least we as a society have hopefully learned from it, as you don't see people walking around referring to asians "japs" much anymore, do we? There you go, that's something positive, right?

Gentlemen, you can't fight in here! THIS IS THE WAR ROOM!

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During the Vietnam War, the VC made sandals out of old tires discarded by the US forces. The GIs called them "Ho Chi Minh Slippers".
"check the imdb cast list before asking who portrayed who in movies please"

You guys need to get over yourselves Really
You don't have to stand tall, but you have to stand up!

In a historical context it wouldn't be surprising if the characters in the movie expressed racial hatred towards the Japanese.
But in days gone by you could actually talk about people from other countries and cultures without it being considered offensive.
It's a Jap sub! Not racist or offensive.
Those Japs are sneaky b*stards, check him for stilts. Racist and offensive.

I have some jap flaps at home. And it's best not to wear them at jap slap (karate) practice.
"check the imdb cast list before asking who portrayed who in movies"

It was very much a slur in WW!!. Younger people don't have that association. When flip-flops came to Calfornia in the 1950s they were first called "zorries". In the 1960s I heard them called "Jap Flaps" which was heard as a racist slur by older Americans.

There does seem to be a lot more pansies these days now that you mention it.
G0dd@m Japs, crank up the Enola Gay!
"check the imdb cast list before asking who portrayed who in movies"

Gee i miss John Wayne, and Americans who weren't p*ssyfied into whining little wimps who get offended at the drop of a hat. At least we still have a few men around.

FDR himself referred to the Japs as LYB's (Little Yellow Bellies) during the war. Ohhhh the humanity!!!!
"check the imdb cast list before asking who portrayed who in movies"

And the dreaded "n-word" comes from a word that means "black." It's all in how you use it, as evidenced by the magical n-word that blacks can freely call each other in triumph but no one else may use it. You'll see similar magic in the homosexual community where there are many words they don't want to be called by others, but freely refer to each other by the very same words.

If you have watched any of 'McHale's Navy' you will hear the word 'Nip' which was the other name that was used for the Japanese and I realized while watching it that (duh) it was short for 'Nippon' (ANA - All Nippon Airways). During WWII the Japanese were referred to - in short - as 'Nips' or 'Japs'. and the United States was at war with Japan. I certainly can think of a lot worse names, but people are more sensitive to people feelings now and will (usually) stop and think before they use a word. But, and this is a sticking point, you follow the standard for what was used during that time in History when you are making a movie. (I direct you to 'Driving Miss Daisy' and the two Sheriff Deputies that pulled over when they saw Miss Daisy and Hoke having lunch. Remember the two Deputies talking as Hoke and Miss Daisy drove away - stating, 'an old Jew Woman and ******' - both terms very derogatory That was a time in History, thankfully past, but to keep from happening again, needs to be remembered.

Why on earth would Jap be more polite than Nip? Nip is short for Nippon, Japanese word for Japan

'Jap' is a rather polite alternative to the more common slang 'Nips' that was used by troops in WW2.'Nips' is mentioned about a dozen times in John Wayne's 'Sands of Iwo Jima'(1949). In this film you'll also hear the Duke himself refer to the 'Japs' as "those little lemon-colored characters".

It seems quite simple to me: calling someone "jap" or beep in real life is clearly racism. Letting a movie character use those words is just depicting a racist scene, which is normal in a movie as, e.g., a murder scene, and might even reflect a historic reality. Trying to convince the audience that the opinions of that character have some factual value today would be an act of racism.

It's the same as saying "Brit" so I see no problem at all. It's just shorter version of the full word. Political correctness is often ridiculous - and this is just another example. People shouldn't take notice of PC bull, but it's difficult when so many people are sheep.

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JK2:
Does JK2 stand for or represent Jerks off too (two) much? You are just retarded. Probably stays at home all day long with his little fun toy.
BAKA YARO! To your brain look it up =========it is a sneaky jap slur.