It's weird to think that ethnic organisations are weird when it's the most natural social group you can form. You are literally genetically similar to these people. You have a shared history, culture, etc. In a biological sense, you have an innate interest in each other's prosperity (at least, moreso than you would an ethnically-distant stranger).

You're taking your "anti-racism" to the point where it is unnatural, absurd, and alienating. People inherently want community with their kin but you are telling them that they are wrong for pursuing it.

So in my city there used to be some clubs, like the Ukrainian Lounge, the Polish Club, etc. which was a club where people paid dues and the only real requirement was to be part polish, ukrainian etc. It was basically just a bar to hang out at. The reason I put it there is that those guys seemed to get lifelong companionship and socialization out of it. Instead of shaming people for what may drive them, I am throwing out options I have observed.