He was in a radio interview and was asked about this. He had one of the most enlightening answers I've heard on the subject. To paraphrase, when white men are constantly hearing about how evil and problematic and racist they are, they are reduced in a way that isn't very different from a lot of anti-black racism. Both take a large group and take away their humanity based on something they have no control over and it's natural to respond strongly to something like that. I think it stings especially hard when you struggle but hear about how easy you have it because of your skin and chromosomes. 

He also, rightly in my opinion, pointed out that a lot of people on the left don't realize what they're doing has this effect. I came away pretty impressed with Mr. Wilson.