They meant to murder Trump--

The advantages, to them, of a dead Republican presidential candidate, must have seemed irresistible--if even Trump had been but seriously wounded- -They could maybe, with a straight face, have run Kamala Harris. But c'mon. Still. I'd like to know, what do you make a Lonely Boy like Thomas Matthew Crooks ingest, and what do you tell him beforehand, to make him be willing to be murdered (immediately) himself, if it were but to murder Trump?  With all the treasonous and incompetent help of the evidently entirely suborned Secret Service, still, what motivated him?