They just don’t get to also whine and bitch about solidarity when socialists criticize them for the laziness and crimes.
What do you mean by "laziness and crimes"? You can't simultaneously believe in democratic socialism and gloat when you help bring Trump to power. Not without being entirely inauthentic.
You shouldn't. Freedom of speech does have some limitations but not in the ways you suggest. It's an integral part of Constitution and this country.
Just doesn't make any sense man. Not providing an opposing view isn't a violation of free speech. People do it constantly.