The fact that I have no idea what party you're referring to illustrates the issue

Would you mind providing examples of each party undermining one another?

This doesn't strike me as something that's a both sides issue, but I'd rather be informed than right, and perhaps I'll be surprised.

"Kids in cages" was a slogan that grossly distorted holding people in facilities (not unlike jail, admittedly) while processing their asylum claims rather than just letting them free to roam the country, unable to legally work. A situation which led to claiming asylum at absurd rates and taxing the asylum courts that weren't designed to be abused.

As a part of that, children were separated from adults until they could verify their custody. "Kids in cages" was really just trying to stop asylum abuse while also keeping an eye out for human trafficking of children.

The effect of that slogan, a complete knee jerk reversal by the Biden administration of those policies not unlike what we see here with the EVs, led to the horrible border situation that played a major role in Trump's second victory.

Damn that's bleak as fuck.

I know where many of my neighbors stand on issues, and if they could get away with killing people they disagree with for fun, they would. There has been a multi decade conditioning that a certain part of the country is not just people that think differently, but the enemy within that must be purged.