It triggers me whenever I see people ceding words like this - and this particularly annoyed me because it wasn't only ceding the phrase "makes America great again" but any phrase of the same grammatical construct!
Growing up trans I was called every name and slur in the book because people learned from others that those slurs might have power over me. The bullies had learned from other trans people that those words had power. That they could make me cry or feel weak or powerless if they held those words over my head. I never gave them that satisfaction though. My response was aways "Yeah, and?" which I had learned from the gay community. And I hate, rather strongly at that, anyone who helps those words retain power so that they can continue to be used to bully other trans children.
Never give words power over you. By doing so you give them power over others. If a word or phrase bothers you so strongly - reclaim it. Turn it into something you control - don't let it be wielded like a stick to hit you with. Why willingly turn it into a weapon that people can use against you?
That goes as much for slurs as it does for "make X Y again". It pisses me off is all.