I think the intriguing thing here is how many Democrats immediately denounced this, regardless of the shooter's party affiliation, and regardless of how much they disagreed with Trump. Predictably, Republicans really want this kid to be a Democrat so they can hold use it on a bully pulpit.
We're not very far removed from Trump inciting an insurrection where people were calling for Nancy Pelosi's head and where multiple law officers were killed protecting the capitol. Despite that, many Republicans, including Trump continued showing support for those people.
It's a tale of two very different political philosophies. Imagine if Biden came minimized the actions of the kid in his first response and then later came out comparing him to a martyr like Trump has with some of the Jan 6th folks.
I think the fact that the violence against Pelosi's husband, the muted (and forgotten) attack on Scalise et. al at the congressional softball diamond, and the plot on Whitmer were scoffed at certainly didn't help the attitude towards violence against political opponents either.