I get what you mean, but there is a real problem among the left. In Germany we had these massive protests against Nazis and for democracy. It was beautiful, finally all kinds of people united against anti-democratic sentiments. We had green voters, conservative voters, labor voters etc. all walking for the same cause. Except for the ultra left. They had to boycott the protests because there were so many CDU (conservative) voters among the people. Way to fuck up something beautiful for something so petty.

This kind of behavior is exploited by the right. It's way easier to unite people via hatred than it is to unite the left.