I'd say it looks like he was an anti-ice nut. At this point, who knows for sure? Just as the Kirk killer's family was conservative, that didn't mean the kid was a conservative. Although, he was obviously mentally unstable.

Here's a snip:

Sources familiar with the investigation into the Dallas immigration facility shooting identified Wednesday's alleged attacker as Joshua Jahn, 29.

The gunman killed one person and injured two others after opening fire on a U.S. Immigration and Customs Enforcement (ICE) facility from a nearby building before taking his own life, police say. The agency earlier mistakenly said two detainees had been killed.

Jahn fired "indiscriminately" at the ICE building, as well as at a van in the sally port where the victims were shot, the Department of Homeland Security (DHS) said. The three detainees were in an unmarked transport van when they were shot, before Jahn took his own life around 7 a.m., according to the sources. He was found dead with a rifle on a nearby rooftop, authorities said.

A photo posted on X by FBI Director Kash Patel showed what appeared to be rifle-caliber ammunition affixed to a clip. The rounds were engraved with an "anti-ICE" message.

Source: https://www.foxnews.com/us/who-joshua-jahn-shooter-deadly-dallas-ice-facility-attack