Honestly I cannot dumb it down any more for you.
Using a certain section of people , unecessarily. He had made his point, fairly well (he certainly has that ability). All he did, deliberately, by adding the contentious bit, was encouraging people who are easily led, to think it is acceptable to ridicule people for wearing an item he said should not be banned.
I am not going to try and explain it further for you. Either you understand, or you don't. I think you do, but think your freedom of speech is acceptable when you say it, but not if it is said against your beliefs.