"Quran says that you have to convert everyone to Islamic faith"

Hey, remember the Crusades? This is not unique to Islam. Any religion can be made into a tool of peace or a tool of war. Wicked leaders will interpret their sacred texts however needed to further their political goals.

"Violent white supremacism is a symptom of multiethnic societies."

All modern societies are multiethnic societies. Once white supremacy is done with the obviously foreign-looking people, it will start to eliminate those who are not white enough, resulting in an existential and violent battle over determination of the "volk". As a descendant of white immigrants whose ancestors would not have been considered fully white in my country, I would not want to live in this environment. No doubt that I would be on the chopping block at some point for not sharing x% blood with some arbitrary progenitor.

"Overall the solution is simple: muslims can have their own countries where they can do what they want, and other people can have their own countries with their own rules."

Well, as a white person in a historically white country, I say Muslims are welcome to be my neighbors, and anyone who disagrees can go live somewhere else.

Crusades were 900 years ago, at a time most people didn't know how to read. Now people don't need leaders to interpret texts. Do you have more recent examples?

> All modern societies are multiethnic societies.

No? Most European societies weren't multiethnic 50 years ago. Poland doesn't have Islamic terrorism, because it has very few muslims. Guess we found the solution for avoiding Islamic terrorism?

> Once white supremacy is done with the obviously foreign-looking people, it will start to eliminate those who are not white enough, resulting in an existential and violent battle over determination of the "volk".

You are using an American definition here. In Europe you don't have "white" people, but French, Germans, Swedish and so on. White people are not inherently bad and what you describe applies better to muslims who have genocided or expelled non-muslim minorities of their countries. See Armenians for instance, or Christians. Or Jews. Or Yezidis. And so on.

"white person in a historically white country" and what happens when you are a minority and you are asked to pay the Jizya? Will you pay? Will you veil your daughter?