They would, if they're useful idiots. If blacks voted their social views, they would be evenly split GOP/Dem; if they voted their foreign policy views, they would be slightly weighted Dem. They all vote Dem because they have been taught to drink the koolaid of all the racist stereotypes about Republicans and conservatives, that we're all old white men who channel our inner Bull Connor. Break that spell, and the voting patterns would change almost overnight.
Sorry, not to belabor my point, but we see this line about how black Americans "really are" trotted out all the time. I won't believe it until I see proof at the polls. Until then, it is no more true than "Islam is a peaceful religion."