The weird thing about all the conspiracy theories about Tyler Robinson is they are coming from MAGA, which means they think they are being lied

A lot of the conspiracies are coming from Nazis, who have always been lukewarm on MAGA. Nazis are ideologically fascist, as opposed to the nihilist Fascism of MAGA. So they like the racism, but it actually annoys them when Trump doesn't follow through. There's also the subservience to Israel, which they're not crazy about.
So it's not surprising that they're saying Kirk was killed because he was about to tell the truth about Israel.