Thete are 435 comgressional districts across the US; 222 are Republicans. I'm not sure who specifically you're referring to, but of want to count even 4 as antisemitism, thats less than 2%, hardly a "norm".

If you would consider that the norm of the republican party, you must too consider antisemitism and violence the norm of the left.

But you and i both know It isn't.

As much as the media and many politicians want us to paint each other as the irrational enemy, that just isn't true.

https://www.ajc.org/news/ilhan-omar-has-a-problem-with-jews

https://www.cnn.com/2021/04/19/politics/maxine-waters-derek-chauvin-trial/index.html

https://nypost.com/2021/02/09/white-house-wont-opine-on-democratic-calls-for-violence/