It's also quite possible that it isn't in the Wikipedia article because it isn't a valid quote. That was the point of my post. The original poster partially used Wikipedia as a source for this alleged quote, but it isn't in the Wikipedia article on De Mille. Perhaps it was there at one time and subsequently removed because its validity was seriously called into question.
I've never known Wikipedia to ""shy away from controversy".

That in itself doesn't mean that it wasn't made, of course, nor that DeMille never said it. It just means that Wikipedia is avoiding controversy.
But if DeMille
did
say it, it seems likely he was talking about specific dominant personalities in the industry, rather than Jewish people in general. You only have to listen to the narration of his remake of
The Ten Commandments
, which DeMille wrote and spoke, to know that he wasn't anti-Semitic.
You might very well think that. I couldn't possibly comment.

The current Wikepedia article does not contain this (alleged) quotation.

First, I'd like to know who initially claimed to have heard this comment.
Second, it seems unlikely that an anti-Semitic DeMille would ever have made
Samson and Delilah
and
The Ten Commandments
(twice) if he "didn't like the Jewish people".
Third, if it's true there was some Jewish blood in the man, the aforementioned comment would have revealed an unlikely dislike of himself.
Fourth, his business partners throughout his career were largely Jewish (Goldwyn, Zukor, Lasky ).
No. Don't think the accusation has much credibility.