Some of the conspiracy theories at the moment are kinda wild. Some are even claiming that the shooter went down the Epstein rabbit hole and snapped after the recently released documents.
Not that I think that this conspiracy has any merit. At the end of the day there are a million different reasons why someone might hate Trump. There are plenty of reasons why someone with a troubled mental health state could decide to do what the shooter did (not that I condone what happened).
As for "charged rhetoric" and what not: Conservatives have spent the last few years painting anyone left of them as "satanic and pedophilic groomers", exclaimed statements like "the only good Democrat is a dead Democrat" and continuously attacked marginalized communities, stoking the flames of hate crimes. The largest source of domestic terrorism in the US comes from the right wing. It's essentially a "leopard ate my face" situation.
Conservatives have been spewing monstrous rhetoric for quite a while. Look at how they reacted, especially Trump, when Nancy Pelosi's husband was attacked. In stark contrast, Biden, Obama and most Democrats immediately condemned yesterday's event. It makes sense anyway, since the current times are volatile and they don't want any MAGA moron snapping and trying to take out Democrats. Yet, despite the tact required to deal with this situation, it is also important to remain realistic and call out how dangerous another Trump presidency would be for multiple different groups of people, as well as the planet (considering the stances on NATO, Israel, Ukraine, climate change). The GOP is genuinely descending into fascism and we need to remember this at every point.
That said, it's fascinatingly ironic how after flirting with the idea for another civil war and sowing division between the sides, the most notable assassination attempt in the US for the last few decades ended up being enacted by a registered Republican.