but I think our conservative counterparts here have been reasonably civil in expressing their thoughts - far more so than the embarrassingly angry mob on the left.

Good grief, Joe. Have you actually read any of the political threads? Jim makes the point that he has posted massive lists of insults and abuse from one person in particular but a number of others are guilty of the same! As to...

Do leftists at Mudcat actually do any of that advocacy? Do they spend time with immigrants and the poor?

For me, yes and yes. Do those on the right? Why single out only those on the left as armchair warriors? You say your are impartial in all this but that is looking increasingly unlikely :-(