I'm periodically struck by the fact that socialist parties always talk about solidarity, but too often mean, "Solidarity with me, not them!" Here's a very strong argument for keeping the focus on the capitalists. From Vote for the Lying Neoliberal Warmonger: It’s Important:
...in the early 1930s, as the National Socialists gained strength, Ernst Thällman, the Chairman of the German Communist Party held to the line that the Social Democrats were a greater threat to the working class and to the possibility of revolution than were the Nazis. The Communists’ conflict with the Social Democrats was both not without justification and mutual. Some Communists believed that the elements of the working class who were drawn to the Nazis, e.g., those in Ernst Röhm’s Brown Shirts, could be won from them. In 1931 some sought to collaborate with the Nazis to bring down the weak Social Democrat government. In expressing the conviction that the Social Democrats were the main danger in German politics, Thällman uttered the quip that has long outlived him as a cautionary device: “After Hitler, our turn.” His point was that a Nazi victory would expose them as fraudulent with no program for the working class. What Thällman didn’t count on was their success at criminalizing and liquidating all opposition. He died in a concentration camp.