I used to be one of those who said reverse racism was a thing and such. Its quite embarrassing looking back. I would say that black people were just as racist as white, if not more. I never really understood power imbalances and class analysis and such until recently.
I was also one of those who would berate the black lives matter movement with the 'surely ALL lives matter' rubbish
This was not even too long ago. I believe at one stage I also asked why there was not straight pride too.