You'd be absolutely incorrect in your guess. And you are right, there is shady whites just like their are shady blacks, asians, latinos, etc. no one race holds the blueprint on being shady. I've been snaked by a few races, white and my own included. do i write off my own race entirely? no, so why would I another?
I've learned early in life to judge the person never the appearance. you can't assume off gp that an individual who doesn't agree with the color shyt you're speaking on is automatically an individual who "haven't dealth with too many whites in adulthood"