Given he has failed to endorse other democratic candidates for the house and senate despite being the dem candidates... I doubt that's his motivation.

But hey far be it from me to suggest the guy that explicitly endorses the genocide of palestinians might be a genuine supporter of a guy that volunteered for the military because he wanted to kill people, did 3 tours with the US military then worked for blackwater and still frequently wears his blackwater hat because he likes that it makes people upset; and that the latter might just be a plant.