The ones I know are well armed, but about as non-violent as you can be and not be a Quaker.
The point is: Neither has he encountered union thugs beating somebody up because he was against unionization. It's a ridiculous myth.
But I don't know about 'union thug' being a myth: lots of actual violence back in the dark days of the last century. Carnegie brought in an army to bust up the union and it wasn't because they were meek lambs.
No, it was irony.