He may know how to type, he's just too damn drunk most of the time. Not only are there typos, but he also confuses pronouns. Who the hell is he even talking about? Can't tell from that mess of word salad.
At some point you have to decide, "I'm not a slave to this device." Seriously. The first thing I do on any new phone is turn off the goddamned autocorrect. I also fix typos so I don't look like more of a dumbass than I already am. Some people are apparently okay with looking like one.
Yeah, let's keep our eye on the ball. He's a dunmbass because he's a racist piece of shit who wants us to believe otherwise. Spelling, typos, and confused diction are the least of his issues.