I was born in the UK but grew up in South Africa, returning here when I was 18.
I could quickly see that the extreme Right and extreme Left meet 'somewhere around the back' and both use the exact same techniques to suppress things they don't like. The South African apartheid govt loathed Communism and made sure that they 'disapeared' got 'banned' got sent to remoe prisons. They also formented insurrection in other countries.
All the things the USA have done.