I have a hypothesis on why Trump backs the Vaxx
His moves have played out, so far, often years into the future with some of his cabinet picks only being exposed as traitors recently. We often get caught up in needing a reason "NOW" or many of us simply cannot fathom a reason at all, while the reason why he does things are often far beyond the purview of most.
Imagine a future in which Trump takes the stand in his defense during the trial of "The democide of billions of humans" in the biggest trial of human history.
Trump: "Why would I tell my supporters to take something that could have possibly killed them? How could I have possibly known the gene-therapy would kill off over half of the worlds population? I even advocated and said that people should have taken it, although I will remind the court that I vehemently professed that it be strictly voluntary."
In a future scenario in which Trump needs to distance himself from the democide of billions of humans, "I support the vaccine" coming out of his mouth now, will be his best defense then.