You're kinda wrong. The notion that the mongols came in and used only force is wrong. The reality is that the people who lived along the northern Silk Road knew of the benefits the mongols provided and willfully supported them in their overthrow of the Kievian Rus. The mongols also provided a pluralistic approach to many things. The Vikings weren't even considered to be white until the 19th century when anglos made up the social construct of race.