I am Dutch and in NL, but acquired an 'original' Trump 2016 MAGA shirt ( a friend brought it from the US ).
I am not pro-Trump, but also not anti-Trump, while normal civilized discourse in my town of 'progressives' is Orange man bad. I enjoy the apparent tension the whole subject seems to generate.
I proudly wear the shirt, which is seen as brave by my friends : it could get me in trouble, but I am a big, assertive guy.
The shirt makes people speak up who would have never spoken up given the climate. Some are pro-Trump and some are not anti-Trump, some are US citizens. It definetly brings out the dynamic you are referring to.
Well, there, I said it.