Why is it you think a lot of white men shame white women who have been intimate with black men?

an

I’m a Caucasian woman and have dated a black man before. I’ve come to notice that a lot of the men I dated after this man shamed me for being intimate with a black person... why is that? I’ve chalked it up to ignorance and insecurity, but I’m curious if this is common among other white women, or other races, what was your experience?