If you’re writing off all liberals then your view makes sense. At our no kings the Brown Berets showed up to protect those you are spurning. Many years ago I attended a UFW march that was also protected by the Brown Berets and it shocked an out of town liberal white woman who compared the union march to the Nazis. These people tend to only see aesthetics so the march is a good opportunity to make unusual alliances. That’s the concrete achievement of my local Marxist-lennist org, but that probably doesn’t make sense to the terminally online.