"communist left" "radical left" Are you sure you don't mean cultural marxism or bolshevism?
Which is to say these are loaded, dogwhistle, amorphous terms that mean different things to different people, but are generally propaganda terms.
As someone who would be seen as a radical leftist by a lot of people, because I basically reject the idea rich people should rule and believe we should redistribute their ill-gotten wealth and use it for something other than epsteining, I can promise you that my time trying to break into the screenwriting, acting, comedy and music professions, I was not welcomed with open arms by a legion of communists in hollywood. The opposite, it was like, and still is like, I do not exist.
You are repeating tired tropes from sites like newsmax and using words that you would probably have a difficult time defining, especially if you think the borg represent any "leftist"'s version of utopia.
Which is to say you are perpetuating tired propaganda representations of your opponents, and at the same time overlooking most of the main points I am trying to make.
"the real problem is that they purged anyone who isnt a radical leftist" - this is just very, very wrong on many levels. No one was purged, everything is done by cultural hegemony, blacklisting, invisible blacklisting, and the people who are still left in the industry, J. J. Abrams might be a hillary clinton supporter or prefer democrats to republicans, but a communist he is not. But his rewrites of start wars and star trek and everything else he touches are radical, so you are going to have to actually work to figure out what his agenda is, not just repeat something you heard somewhere.