Is guess I could've said "I'm not sure why you're arguing" instead of "I'm not sure what you're arguing".

you do this nationalist thing

I'm not American, how would speaking well of a nation I've never even visited be nationalist? (I can already imagine you calling me a traitor to my own country)

half-hearted US support

As opposed to full-hearted US support? You don't have to be extremely against something or extremely for something (though I'm aware extreme leftists would like to see it that way).

I do recognize the negative things the US does and has done. But that does not mean that I'll unreasonably make up negatives (like the USA not being strong while being the strongest nation).

There are enough factual things to dislike the USA about, no need to make stuff up on top of that.