The rich have never cared about things you mentioned. They have always exploited the working class, all this talk of "shared blood, culture and history" has largely been just a tool of control, not something they actually cared about. Before that, it was God which they used to keep the peasants in control.
Fair distribution of wealth, that is ultimately the only real question that matters. The ultra-rich are the threat to our nations, not the poor masses of immigrants, who are simply brought in to make them even more money.