Actually... I've been thinking if I should mention this concept in this thread, and your post gives me the opening, I hope you don't mind.
First, we have to distinguish bigotry and racism. Most people when they think racism/racist they think of bigotry - the willful hatred of others based on perceived differences. And if you had written "Most people aren't bigots" I 100% would have agreed with you. But racism is not just that. It's not a binary state - either hateful or completely pure. There are all sorts of shades of it, levels, permutations.
We live in a society built on racist foundations - just look at our history, it's undeniable. And these racists ideas, tropes, notions, (and canards as
@Ruin Explorer said) are all around us. In our media, in the news, in our laws, in corporate practices, etc, passed on down each generation.
It would be
astonishing if I grew up and lived in this environment and
somehow managed not to be racist! What am I, some sort of saint?!?
I'll give you a small example. Until about 5 years ago, I sometimes use the verb (spoiler for slur)
, meaning cheated, tricked or swindled. That is, until I learned the origin - this verb was based on prejudice against the Roma! So I stopped, and I've been telling friends when they use it (and they are just as "oh crap!" as I was).
So most of of us are not bigots, absolutely. But most of us - and I definitely include myself in this - have these ideas, these cultural ticks, habits, beliefs, that we have picked up from the past/present. And we have to be on guard, reflect, grow, so that we can be
less racist. It's a multi generation project.
Whenever someone says "I'm not racist!!!"... I sometimes wonder how deeply they've thought about it.