Why would I write that off? The chart you posted is about attitudes toward political violence not mass shootings. Those are two very different things. (And I don't support violence as a method of conflict resolution)
Also, very liberal doesn't equal trans, so you're merging unrelated categories together.
If we're being honest (not hell bent on tying evertying to a team jersey), then the reality is that most mass shootings are not cleanly tied to Democrat vs Republican ideology at all. A large percentage are personal grievance, nihilism, mental illness, domestic conflict and more often than not unclear motives (as I showed in my chart above).
I just don't understand the constant need to identify everything through this broad-brush methodology where isolated examples suddenly become proof that an entire demographic, ideology or movement is inherently dangerous. Thats the same bs mindset of things like "all cops are bad," "all conservatives are racist," "had he been black" etc.
Heck, I don't think "All MAGAs are bad" and if you notice, I have beef with the MAGAs who specifically hijack my faith and weaponize it for political gain.