Sorry, I was mostly being sarcastic.

In all seriousness, a lot of people on the left think very critically about their beliefs and struggle with accepting others after becoming so thoroughly dedicated to their own. This is something we need to overcome for trivial things, for sure.

But, as you said, tankies are a threat. They call for unity to simply to gather forces to oppress others until they can turn and oppress the same leftists they called to for unity.