If conservatives are a race, then I'm a proud racist.

Perhaps he thinks only white people can be Conservatives.

How is being biased "racism"? If I have a bias in favor of Coke over Pepsi, am I now a racist? Racism involves races, and conservatives, while exclusively white, are not technically a race. The proper term is a cult.
Twitter doesn't have to allow anyone they don't want on there anyway. As a conservative, obviously you are against government intrusion into a private business. Just reminding you here.

Conservatives should either create their own platform or join gab.ai instead of threatening to sue.