Like any other identifiable group, white people are allowed to speak for and defend themselves. "White shaming" isn't the same thing as fighting for racial equality, and in its own way is actually a form of racism.

If you are advocating for broad conclusions to be drawn about an entire race, and trying to shame individual members of said race into not speaking in their own defence, then perhaps you should reflect on whether or not you're peddling racial intolerance.