How is OP "trying to hide" anything? Saying we shouldn't aggregate and publish PII about the parents of a terrorist who have sought legal protection from that person isn't "trying to hide" anything, it's pleading for others to prevent harassment. There's zero evidence that the parents have anything to do with this and some evidence of the opposite, yet the OP is trying to create a link because they share political opinions with the current administration.

I get it, I strongly dislike Trump and have since I saw him in the primaries back in the 2010s, and I would like nothing more than for every bad thing to be legitimately caused by him and his ideas. But that's not the case, and that doesn't mean every crazy person with a gun was somehow corrupted by parents who likely voted for Trump.

It's much more likely that the parents did their best to teach the kid respect for first responders (conservatives tend to have a hard-on for police and firefighters), guns, etc, and the kid stumbled onto a manipulative online community at just the wrong time in his life (say, a messy divorce) and that corrupted him. Or maybe it's a classic case of schizophrenia. Idk, but I'm pretty sure his parents' political beliefs are unrelated. This could've happened to a family with progressive views who also happen to like guns, I knew plenty of those growing up.

You do realize that "doxxing" uses "free and open" information too, right?