Have you ever talked to one? Tried to engage them in discussion? It is like speaking to a CD or record. The left is totally incapable of hearing anything that contradicts or challenges their world view.
I learned to use semantics from the SDS minions long, long ago. Not even that works on today’s left. They are completely deaf to anything they haven’t had encoded in their brains.
I have, and it's exactly as you wrote. The left generally hates Christians and fears a theocracy, but when it comes to blind faith in an an ideology, few approach the left. Progressivism is literally their religion.
Talking to/with them can serve a valuable purpose, but convincing them is not it. Engaging with them is only valuable when it comes to convincing an onlooker who may be on the fence. Otherwise, mocking them and scaring them for sport is about all that can be accomplished.