Y'know, back when the 2016 elections were winding up, I really wanted to make up a birther movement around Trump.
Basic gist being: He's actually from a predominantly Islamic (African? Might be a bit too on the nose vis-a-vis Obama) country, and is himself a Muslim. Exiled from his home country for reasons (probably), he saw opportunity in America and started to set his grand plan in motion.
The idea here being that he wanted to establish his own caliphate, and thus declare his former detractors as blasphemers. But first he needed to get rid of any competition, hence the rabble-rousing for pushing all the other Muslims out of the country, and preventing any more from getting in.
He also concealed his origins by severely bleaching his hair and undergoing skin pigmentation alterations, resulting in the... Somewhat uncommon coloration he possesses, and lends to his vehement denial that any of it is anything less than natural and healthy (also his obsession with the size of his hands, as it's well-known that people of Arabic descent tend to have large hands. No conspiracy theory is complete without referencing well-known facts that don't exist). English isn't his native language, so the relatively limited vocabulary and occasional misunderstandings are to be expected... Honestly, he's doing very well, all things considered!
This would also explain the at times inappropriate interactions with his daughter. Namely, she isn't his daughter; she's his second wife. The "daughter" angle was invented due to the States' stance on polygamy. Since she's the newer, younger wife, she's also the current favorite, which is why he seems to be a lot more touchy-feely with her than with wife number 1.
Of course he'd be ferocious in going after IS, they're direct competition to his plans. There can only be one caliphate, and neglecting the one presented by IS would harm his credibility when he moves into later stages of the plan and starts trying to gather adherents.
Misogyny? Women are seductresses capable of damaging society if left to their own sexualities and identities. They are to be possessions, tamed and controlled by men of the true faith. Just grab 'em by the pussy, show them who's boss.
China? China hates Muslims, so the Muslims hate China right back.
Mexicans? ...okay, I don't have a good answer for this. Maybe a threat, due to Mexico being a predominantly (and oftentimes strongly) Catholic nation? I'unno.
I was never really satisfied with it as a whole, but I liked the concept of trying to turn around the birther argument with something even more ridiculous.