This is blatant denialism by Margaret Wente. Minimizing or dismissing the lived experiences of marginalized communities is no different than actively supporting and/or engaging in racism. 

And this attitude harkens back to the bad old days of overt racism. Virtually everyone today will concede that racism was rampant and did great harm in the past. But if you go back in history, when history wasn't history but the present, nearly everyone except the victims of racism denied the mere existence of racism. So, dismissing or minimizing racism is nothing new in North America.