Look at what "entryism" in science fiction in America. When shit like this deserves a Nebula and is nominated for Hugo then yes, SJW "entryism" does lower quality: http://www.apex-magazine.com/if-you-were-a-dinosaur-my-love/

I don't think that story got a Nebula - the author won a Nebula for this:

http://subterraneanpress.com/magazine/summer_2010/fiction_the_lady_who_plucked_red_flowers_beneath_the_queens_window_by_rache

[EDIT: My mistake, both stories won Nebulas.]

Nevertheless, that the same author would write a story which can be partially summerised as saying "Wouldn't it be awesome to be a T-Rex! You could kill homophobes! I'd laugh so hard!" is pretty disturbing.

But its not as disturbing as the people who decided that debating using logic is racist, and first rap should be allowed in formal debates, and then the US national debate championship was won by people screaming incoherently.

This is how civilisation dies.