I can't say for sure, but I have noticed that there are usually errors in spelling and grammar in such comments. Often, when people hurl an insult, it's something that they subconsciously believe about themselves: it bothers them, so they assume it will bother others.
An "educated bastard."
Democrats. Weren't they the ones referring to Trump supporters and uneducated whites?
It depends on if the lack of education is willingly or not