Notice how it's easier to assume the other side is ridiculous and stupid than it is to consider that their arguments could have some validity as well. Wayyy to many of my coworkers are die-hard Trump fans and can't imagine how dumb people would have to be to vote blue.
I assume the arguments we are supposed to consider aren't the outrageously bigoted ones. Are there other ones in favor of Donald? Hard mode: that are based in reality?
One hot topic is abortion. A large majority of Christians have religious reasons to believe that abortion for non-emergency medical reasons is considered murder. Trump has repeatedly pledged to fight to overturn current abortion laws (even though there is nothing he can do about it anyway). Unsurprisingly, most Christians I have interacted with are right-leaning, if not completely horizontal. It's also much easier for people to wrap their heads around abortion than it is the national/global economy, so naturally many people would care more about that, even if Harris has better economic policies.
On a surface level, yes, tribalism is easy to fall into and it's important to examine your biases and reflect on your beliefs. Having done that though, it becomes clear that the Republicans are in fact stupid and ridiculous. It's easy to see that their talking points are the results of ignorance and fascist propaganda and not much else. There are underlying reasons for that of course, fascist propaganda heightens feelings of fear, anger, and resentment, and appeals to people who feel aggrieved, especially about the loss of stability, privilege, or an imagined better past. We can't do away with standards and values. We can't allow our minds to be so open that our brains fall out. Republicans do measurably, objectively far more harm.