Bingo.
Leftism, in its present form, is not really “pro” anything.
It is only a nihilist rejection of Western civ and everything it stands for. Since Western civ is based on Christianity, that religion is by definition evil.
Any other religion or ideology that opposes Western civ is a good thing.
WAY too many conservatives fall into the intellectual trap of thinking leftists oppose America because it is insufficiently liberal, or socialist, or feminist, or environmentalist, etc., etc.
In actual fact all of these causes are only rationalizations they are able to point to to justify to themselves their loathing of our civilization. The loathing is free-standing and emotional in its basis.
This is why movement in the direction they propose never mitigates their hatred. Their true goal, often subconcious, is the destruction of Western civilization, and nothing short of that will satisfy them in the least.