To start with, racism is racism. The only thing that truly varies is the degree to which it may be praticed. You indicate that I only see racism as sever cases. Not true. It can be as simple as someone reffering to a racial group by using racial slurs. They do not have to actively oppose that group. It can be much more subtle than that.
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I stand here proudly and reject your notion that every member of mankind is racist. Why? because I know those that are not. I hope to be as good as them.
I would consider the use of racial slurs to be an overt action. So, what I got from your post is that you see racism as consisting of overt actions, the intentional slurs, intentional decisions, etc. That's what I said your position was earlier. Perhaps I am still misunderstanding somehow. Now, if you take the position that racism requires overt actions and words, I would agree with you that it is rapidly becoming socially unacceptable, and is fading from our culture. When I talk about the racism prevalent in our culture, I don't mean an outright refusal to associate, deny admittance, etc. Of course we have made progress there. So, were I to limit racism in the manner you seem to, I would agree with you.
AS for what I do mean, I've discussed several examples in this thread already. I'm not going to repeat them right now, but I'm willing to discuss them if you so choose. I do think they examplify racism, but not of the sort you seem to want to restrict that definition to.
An interesting parable on the subject:
https://thetyee.ca/Books/2012/09/15/Too-Asian-Allegory/