See this post on how to put a user on ignore. Should you opt not to add a user to your ignore list, some things to keep in mind.
I’ve been doing this a long time and I can count on my right thumb the number of times a user’s mind was changed based on arguments on a thread.
So with that in mind, for any user who thinks they will be able to gain followers, you won’t. So don’t make the same point over and over.
For those users who disagree with another user’s position, after the first rebuttal, stop taking the bait.