I’m not even disagreeing that it’s discriminatory, but institutional/systemic racism is by definition at a high level. It affects individuals but the scope is much higher level. So it cannot be evidence of said racism against whites. That’s why people get argumentative about this. It’s hard for the white race to be simultaneously oppressed and enjoying the majority of global power, right?
Going back to the imprisonment for weed example, that’s the kind of thing that could have real generational impact. You having to job search for an extra few weeks or months probably didn’t affect your grandchildren, right? The statistics for black men in prison for non violent crimes is shocking in the states.