Why do White Liberals think they know better than minorities themselves about minority issues in their communities and American society?

White Liberals often claim to be "tolerant" and "anti-racist" yet will either act very smug and condescending towards non-whites who don't hold the same political views as them or straight up attack them and revoke their "minority card".
Why do White Liberals think they know better than minorities themselves about minority issues in their communities and American society?
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