“brotherhood” seems like a fancy word used in propaganda. It’s too high level and too abstract.

You don’t start with “brotherhood”.

A you start with respect. Respecting your neighbor. Respecting people practicing some different religion, or having different sexual orientation, or speaking different language, or practicing different traditions.

“brotherhood” is about recognizing that we are all human despite all the differences in the ways we live.

First do that. And that is fundamental difference between the US and russia.