EU referendum, brexit and the aftermath

I always thought socialism was about supporting your comrades, not vilifying them if they don't share your viewpoint.

Not if your brand of socialism is really all about identity politics. In that case any challenge to your views is an existential threat, and the only option is therefore to either shout down any dissenters or drive them away from any debate by personal abuse. You then end up with @greenhell, Momentum, the ERG and arch-Brexiteer wing of UKIP, all playing from the same rulebook just wearing different colours. Hurling abuse at everyone else safe in their little enclave of ideological purity.