"Races do not exist" ...

or "are social constructs"

What the fuck does that even mean? It is pretty obvious that they do. I seriously do not get it. Does anyone here have the knowledge to defend these seemingly ridiculous statements from a scientific perspective?

Aside from a single Berkeley bio class (which I didn't attend), I've never heard of any claims of denying race.  Why would the Jews want to deny race?  Isn't it in their interest to say "oh look at me, I'm a persecuted minority"?