Are BLM and Antifa comparable to the Nazis?

Only if your meaning is to get rid of the Nazis.................

I'm not a fan of equating anyone to the Nazis, but BLM and ANTIFA are both PC/progressive thug organizations, with the express purpose of destroying the country's foundations and building something else.   Call 'em whatever you want.

No.  White men who are comparable to Nazis are spreading false accusations about BLM and Antifa in order to frighten other white men into supporting their cause.  But I suspect you already know this since this seems to be the purpose of this question.

No the nazis promoted white men, I dont understand what you are trying to get at.

Nope. Thats what the GOP and Trump is doing to this nation. But I get whenever anything goes wrong. Blame the poor  black man.

Yes.......................

Klan with a tan

Yes, if you watch what BLM and Antifa are doing.Targeting Whites, this time.
Then check out the Pathe News Reels of the 1930s, you might notice a similarity.

Things might be confusing as National Socialist German Workers Party members were againts Communism and other dubious groups. You may need to be reminded that Jews, and Gypsies were hated the world over, the Jews killed Christ, and the Gypsies were "well known" thieves, and con artists.
In the USA the Democratic Parties KKK were intimidating and killing Catholics, Jews, minorities, immigrants, anyone not WASP.

No.  Marxists are communists.

Not comparable. Hitler was selective.