In other opinion polls they back up that he doesn't suck. Either way who cares? That's not what the app is supposed to be about if it's teaching/correcting you how to argue/debate better.

You completely ignored the whole point of what I said, which is that even in a simple statement like "This person sucks" it added its own implicit connotations, namely that disliking someone who happens to be black is implicit racism. Imagine trying to learn how to really argue with that kind of teacher.

I'm really expanding on your point - that two humans can't even agree here. The AI probably has even less chance of resolving the multi-factorial scenario we're in.

Whose discourse do you think the app would label as more toxic, Trump's or Obama's?