Not the person you asked, and I don’t agree with the person you asked, however the article does mention some circumstantial evidence.

This lack of a motive is particularly important in light of all the conspiracy theories and partisan exploitation that have filled the void. Indeed, there is a distinct possibility we may never have a clear picture of what drove Crooks, who also searched online, according to investigators, for information about President Biden’s appearances, the Democratic National Convention, and “major depression disorder.”

Ultimately, a thorough investigation of this case may show, as with many assassination attempts in modern history, that political ideology was not a driving factor. It is quite plausible that Crooks was suicidal and wanted to go out in a blaze of infamy, an act that has grown more common among disturbed and desperate young men.

Crooks was researching depression disorder which suggests he may very well have been depressed which could suggest suicidal. Since he was looking up information about both candidates, it suggests he was less concerned about which candidate shot as he was with which offered the better opportunity for success. Recent assassinations and attempted assassinations have involved shooters that were not acting out of a desire for political change, but for some other reason. Take Reagan’s shooter, John Hinckley, for example. He shot Reagan because he thought it would impress Jodie Foster and she’d fall in love with him. Or former Japanese Prime Minister Shinzo Abe’s shooter who killed him over a grudge he had against the church Abe was associated with.

It is clearly too soon to say what his motive was, and we may never really know. It is also far to soon to dismiss any reasonable motive until there is evidence to do so.