I don't think the McCarren-Walker Act is new information for Trump. The act preceded McCarthyism but it's intention was the same. Would you agree?

The McCarran-Walter Act moved away from excluding immigrants based simply upon country of origin. Instead it focused upon denying immigrants who were unlawful, immoral, diseased in any way, politically radical etc. and accepting those who were willing and able to assimilate into the US economic, social, and political structures, which restructured how immigration law was handled. Furthermore, the most notable exclusions were anyone even remotely associated with communism which in the early days of the Cold War was seen as a serious threat to US democracy. [I]The main objective of this was to block any spread of communism from outside post WWII countries,...

Who defended McCarthy? Cohn
And what does Cohn have to do with Trump?

‘He Brutalized For You’ - POLITICO Magazine

Some use to be afraid of Communists. Some are now afraid of Muslims and Mexicans. Fear is a great motivator that deceptive politicians use to their advantage.

In another thread some unknown said there will be violence if Trump is elected. See how many likes and retweets there are? He speaks for himself not millions. Don't let others fool you.