Even ultra-liberal Cambridge has vestiges of racism. Even internationally respected scholars can be treated as criminals. Profiling is something a white person will likely never experience. An Offering from Peggy McIntosh’s classic article “White Privilege: Unpacking the Invisible Backpack”

“I realized that since hierarchies in our society are interlocking, there was most likely a phenomenon of white privilege, which was similarly denied and protected. As a white person, I realized I had been taught about racism as something which puts others at a disadvantage, but had been taught not to see one of its corollary aspects, white privilege which puts me at an advantage. I think whites are carefully taught not to recognize white privilege, as males are taught not to recognize male privilege. So I have begun in an untutored way to ask what it is like to have white privilege. I have come to see white privilege..”http://www.nymbp.org/reference/WhitePrivilege.pdf