One is pale and wears a hoodie and loves DEI. The one described here is tan and wears a gold chain and is really mad that some lady executive forced him to do DEI in the past.

I assume this is again some kind of joke. I'd appreciate if someone explained it without making another hard to decipher joke.

Yes, this is a joke - implying that his stance on DEI is self-serving and simply changes with the political climate. The physical appearance change is more superficial, but could also be seen as a change in PR strategy.

The joke above was that in a phrase like "Meta's Mark Zuckerberg ...", the first word is unnecessary because he's one of the most famous people in Tech, if not the country in general.

I guess my problem is that I had no idea that he changed his visual appearance so these references just confused me. I'm not really following his personal life.

There's also Mark Zuckerberg from Facebook.

That doesn't narrow it down. Who isn't on Facebook these days?

Reminds me of that quote from Paul McCartney and John Lennon (from The Beatles) about Jesus (from the Bible)...

To be clear, I was referring to the 1960's band The Beatles, and the religious text called The Bible.