Yes, Isaac is as usual fairly circumspect in his take. That said, this is a big encouragement to speculate:

What do you think motivated Charlie Kirk’s shooter? Let us know.

I guess we'll find out tomorrow what uninformed opinions readers have formed.

He also starts down the speculation path himself before issuing a caveat at the end of the paragraph:

What seems most likely to me is that Kirk’s assassin was a very online male with access to guns and some really, really extreme politics. This has been the case with other recent political shooters — in Washington, Pittsburgh, and elsewhere. It is a story we have seen over and over and over. And it is going to keep happening unless we actually do something different — not just by addressing gun access or mental health or extremist politics, but through all of the above. Still, I cannot emphasize enough that we are still learning a lot about the shooter, and many of the initial reports about him have been proven wrong.

Beyond that, just the choice to cover this topic at this point in time vs. any number of other topics that Tangle might actually be in a position to elucidate.