Here's that page as it was in 2016. You can see the first definition is still, "A doctrine or belief", and second, separate definition is still "A policy, system of government", etc.

They did not "change the definition" - they expanded each section individually to have more depth and more examples, as they did with all the other words.

Nothing in the primary definition says that "racism can only be perpetuated by the dominant group". Perhaps you are unaware that the individual definitions are independent of each other?

This article could be entitled, "I haven't used a dictionary in years, and I don't want to hear anything about racism."

Honestly, when you say, "I speak my mind" in their profile, everyone sighs and expects an outburst of hate speech.

Gosh, what a surprise. A majority of your articles are also complaining about Black people!

Gosh, you really seem to spend a lot of your time being personally aggrieved by people of color. My guess is you're a American white Southerner who voted for Trump. Am I right?