“Never said otherwise, just that heritage is not something you get from your race, but from your culture”. That was enough to set you off to the point that you said culture never did anything positive for humanity? The obvious answer is that heritage can be drawn from both race and culture but neither is absolutely required. None of that explains the things you said about foreigners or about culture being a blight on humanity.
“My question was, in this spectrum, where would you draw a line between what is acceptable and what is not?” That wasn’t your question but let’s answer that anyway. The line would fall between providing social services and taking children to abuse. One would think that would be obvious. This would be enforced by society usually with a government and a system of laws. It isn’t arbitrary it’s a social consensus. You are very slowly rediscovering the fundamentals of society, government, and civilization.