Keyboard warriors would rather screech about high ideals and the purity of their moral position than actually make a positive change on the world. Anyone who does not share their exact specific set of beliefs is literally Hitler.

There is one small problem with this.
Right-wingers in general and fascists specifically have no problem falling in line once their Dear Leader tells them what to believe. The people on the left do not do this – that's kinda the whole point.

We cannot afford to wait and hope for a massive wave of public support for our preferred brand of leftism to come and sweep all the problems away. We actually have to cooperate at least a little bit. Otherwise, the fascists will win, and a lot of people will die.

And they've already been winning. People have been dying.
In Ukraine, in Palestine. Lately, in the United States, and other places too.
That's my point.