For sure, people who say stuff that sounds like they don't like any white men get a lot of attention. But, I suspect they form a very small minority, also on the Left.
Can I ask, what for you are some important examples of anti-"median-white-American-man" statements? I'm aware that there is a prevailing narrative in many parts of the media that this group is being singled out a lot, but personally I don't often see blanket statements of that sort.