Standing up for the little guy is admirable, especially when doing so could get you in a lot of trouble. Back during the Civil Rights movement, siding with systematically oppressed people could land you in a lot of hot water, and there are countless stories of people's livelihoods and careers being destroyed in the process of standing up for what they believe in.
Fast forward to today and there are still huge divides between socio-economic classes and races in America, and people are always quick to point out and rightfully shame those who are mean/daft enough to think they can get away with discrimination. There's a culture that, thanks to the internet, is quick to call out garbage behavior and get eyes on the "bad eggs" who are perpetrating it.
But it's also, unfortunately, given rise to a wave of individuals who are very quick to try and force a discrimination narrative when there really isn't one to begin with, like this mother who called out a bunch of people for doing just that with her adopted daughter.