Shootings do not happen in a vacuum. They happen due to external factors such as political or religious radicalization or "just" bullying. This does not absolve the shooter of the responsibility of course since the response to, let's say, the Great Replacement Theory lies in the hands of the shooter. The shooter could have not shot non-white people.

But then we have the people spreading the Great Replacement Theory. The people that tell their audience day in and day out that if they are not careful, there may be no whites anymore. If you keep hearing this or other racist shit day in and day out for many many many years and do not trust another source of information because the same people tell you that the other media is corrupt... You're bound to turn "crazy" one way or another.

There's probably even more nuance but my point is: We really shouldn't let the people turning responsible gun owners into shooters through propaganda just get away with it, should we?

Especially in the right wing where this is a known tactic. They radicalize people and if something goes awry, they just disavow it. The right wing pundits disavowed the Jan 6 rioters they themselves "inspired" to fight for democracy. They disavowed the Club Q shooter they themselves "warned" about trans people.