There is a lot of research on this. Learning about racism doesn't make white kids feel guilty. Here is what it does. Summary of some of the studies here: fivethirtyeight.com/features/wha...

well I can see why that would be a problem then

One of the problems of course is that the parents don't want their children to have empathy toward groups that experience racism.

learning about racism, slavery, the impact of colonization of this country to native peoples made me feel sad and angry, not guilty. the ones complaining their kids are made to feel guilty are those who are mad they have to hide how much they long to return to the 19th century white Xtian supremacy

I’d expect that it makes some of them question their parents in ways those parents don’t appreciate, which is the real motivation.

oh, well, we can't have that

In other words, even worse news for racist parents than guilt would be

I mean... Yes. This is why they don't like it. The other thing is a very transparent lie.

"Latino and Black youth, for instance, reported a greater willingness to participate in acts of political engagement and were also more willing to express their views on a variety of issues." That's exactly what they don't want to happen.

“having any empathy at all with minorities” is exactly what they mean by “feeling guilty”

My guess: it makes the kids empathetic and the parents feel guilty and threatened.