1/ There’s a huge schism growing on the left I’ve struggled to understand. 

And, I think I’ve figured out how to put words to it, please tell me if this rings true to you. 

There are Policy Leftists and Infinite Leftists. 

I am a Policy Leftist. There are specific policies I want with a beginning and end. I can argue them from a rational basis without calling you names if you disagree. Single payer healthcare. Lowering housing costs. Civil rights for LGBT people.