At least some of that rhetoric was directed at the GPL specifically. And in that sense, many people in the open source world feel similarly and avoid copyleft.
I've interacted online with some BSD zealots that were so invested in not using Linux they pretend not to know what systemd is and things like that, in order to signal to the rest of the irc channel how plugged in they are to the BSD community.
Edit: down voted for answering the question asked? Good grief.