The liberal instinct is to appear "not too crazy" and to appease conservatives with compromise because otherwise the conservatives will get violent. Thus, when we show up we are "making them look bad" and "ruining their moderate image" through guilt by association. It doesn't help that they never appease us with compromise but only ever reserve compromise for those to their right. This is because they always imagine themselves to be "left of center" and thus compromising with anyone further to their left is "going too far" or "becoming a tankie." or whatever. The cherry on top is that they don't understand that both the liberal and conservative political classes are part of a joint capitalist class dictatorship. They will unironically say "you need both wings to fly" while not realizing the body of the plane itself only carries the capitalists and drops bombs on the workers.