This is what happens when hyper-individuality becomes a core of your (western) society. It’s also a byproduct that inadvertently benefits the ruling class. They want division and leftist pockets are already doing it themselves in a lot of cases. Purity tests can fracture communities and needlessly push away potential allies.
It’s why I tend to quote Fred Hampton often. He correctly understood that it was a working class versus ruling class situation and that arguing amongst ourselves was detrimental to organizing. It’s a vertical fight and horizontal attacks waste energy. You can still point out errors in what a comrade says. Criticism, self-criticism, and debate are all components of democratic centralism.