There's no clash of cultures in the US

The USA right now is defined by people who have complete meltdowns over different skin colors and artificial made-in-USA concepts like "cultural appropriation".

Your problem is that your country is big, so big people could just stick to themselves, but now the population's exploded, everyone who lived in it has been meeting with one another for 100 years and the internet was the cherry on top for everyone to start screaming their throats out over people being different, which isn't helped by the fact that people are pushing to differentiate themselves from others even more with anything they can find under that trademarked concept of "identity".

The USA, like Sweden, is a great example of how not to do things.