Warren showed she is a white supremacist by releasing a DNA test proving she is 99.9999% white to signal to the alt-right that she is /our aryan queen/ and she needs our endorsement for the 2020 election. Why else would a democrat start their presidential campaign by releasing DNA results proving they are pure white if not to dogwhistle to Trump voters in the rust belt.
Here is an Ad she released with people praising her white heritage at harvard law, show casing her all white family, and lauding the pure white results of the DNA test.