I don't think you do. Your platform should have an explicit and expected code of conduct set up in advance, and people should be held to it. If they cannot, they aren't allowed to use the platform.
When it becomes apparent that there are cultural norms that make it difficult or impossible for people from those cultures to use your platform, you re-examine your code of conduct, of course, to make sure you're not unduly excluding people. If you are, you amend the code, you change the platform in ways necessary to support them, and everyone tends to end up better off as a result.
But some cultural norms will be antithetical to the point of the platform, like in this case: SO cannot function properly when people attempt to game the system. In those cases, the CoC remains, and people from that culture will either have to adapt to the platform or find (or make) a similar one that works for them.
The alternative, as we see here, is that your platform degrades until it's not useful to _anyone,_ this "problem culture" included.