Many of them came from working class/poor backgrounds so I can understand how they don't see the privilege they have.
You would think that, after dating someone from a group impacted by systemic racism, they would be even more understanding of these difficulties and challenges than someone who hadn't.
Whoever their partners are share some culpability for that dynamic existing. They are usually the "Conservative first & foremost types" who don't believe in systemic racism themselves. They are only ever Black, Latino, Asian or other when it's convenient, primarily to enter into non white spaces to push their "conservative" views & opinons on to others.