> They have a tight sense of community and most of them never assimilate wherever they go and barely make effort to speak the local language.

This has been my impression as well. The Roma seem to first identify themselves as part of their community and only then, part of the common folk in the country they reside in. Many also follow some internal social group laws that are often totally illegal, e.g., bride market.

To answer your question, I believe there’s a strong mismatch in culture and I do not see a way to solve this problem with any possible social or state actions.

The problem, as it seems, will solve itself in the long term as the Roma population has a greater positive net increase compared to the non-Roma population in Eastern Europe. It seems in some decades from now, Eastern Europe will mostly be Roma populated. Is that good or bad, I honestly don’t know.

Some interesting figures reported by Reuters - https://www.google.com/amp/s/mobile.reuters.com/article/amp/.... The year is 2009 but to me it seems valid for 2020, though population numbers may have doubled since then.