An immigrant and his host society.

It has always been taken as a given that an immigrant who seeks to come to a host society does so to be a part of it and to contribute to it greater common good.

However, if he is Genghis Khan with his Golden Horde, he will seek admission into his host society of choice to conquer and impose upon it his will.
If he is opposed he will genocide the host nation.
How wonderful it is, therefore, that Genghis has gone.

However, there is concern that an isomorphic ilk of his kind has replaced him in the 20th/21st Century.
Who they are need-not-be-named! However, from their ranks have been their leaders who have been very honest and forthright what their intentions are. They intend to Genghisfy the entire West.
And, like Genghis, by astronomical fertility rates of 3.9+++, their method of conquest is be their shere numbers that will overwhelm the indigent populace whose fertility rate is 1.1. At 1.1 the native population is doomed to an inevitable demographic death.

Genghis Lives.