If your culture is getting run over that easy it isn't much of a culture either. The same applies to you as you want to apply to the culture before you, only your unsupported assertion that it is different is different.
You have chosen a view here that prevents you from seeing that they can't assimilate if you make hating them and assuming they are inferior a part of your culture.
You could have a culture. Food, drinks, clothing styles, mannerisms and so on. They have a culture. Collapse your culture into "not them" and you will fail in the same way you cannot win a fight by only defending.
