As someone who would tend to identify as a syndicist anarchist. I'm actually quite Pro Union. At least in the local sense. Not in a hierarchical national sense. Perhaps you'd have a better time talking to people if you listen to them. Let them tell you who they are. Rather than making up things to comfort yourself and fit your beliefs. If you've been paying attention you'll note that I've not made any assumptions about your personal beliefs. Merely addressing things you've actually said. Not making strawman. But addressing you factually. That's what someone does in a good faith discussion.
That immigrants are being taken advantage of to bust unions isn't the fault of the immigrants. You're victim blaming again. Don't do that. Immigrants are our brothers and sisters as much as anyone is. You want to stop the Union busting. You get them into the Union. You get them representation and rights. Busting busted. Until you do that the bougiest of the bourgeoisie are going to always find another group to abuse in order to hurt workers.