This is the larger point I was trying to make and why I don't consider what I did as hijacking
You start off by saying the left must be united against the right, but then you carve out a specific exception for when we should shun those on the "left". When people "divide the left" they do it for principled reasons not because theyre opposed to any sort of collaboration. In fact it is the whole idea of "leftist unity" that is idealist, the idea that eveyrone on the left shares fundamental values is just naive and kind of patronising. Really the labels left and right aren't very useful at all they are broad tendancies and don't point to any particular ideology or set of foundational beliefs.
https://www.youtube.com/watch?v=h-jwkMEGHG8