This is blatantly incorrect. Skin color is a proxy for genetics, and genetics are a proxy for culture.

Now that is blatantly incorrect. If you are a remotely sane individual, you will have more in common with a black Nigerian Christian than with a white Bosnian Muslim. I meant to say that you don't have anything in common necessarily, and that it is quite a bad measuring stick.

but you are absolutely more likely to share values, standards, and practices with someone who looks like you.

I disagree that someone who is your color 'looks like you'.

Every other race has been encouraged to pursue solidarity.

Only in your country. Not anywhere else. You don't see Muslims pursuing solidarity with people of their color who do not share their religion.