Theres plenty of intermarriage going on and you can’t segregate European whites from non European whites. High birth rates among immigrants dissipates over time. And so on. You can not extrapolate current immigration rates; ie during the 1930’s there was net emmigration from here. Muslims don’t assimilate well and Blacks do so poorly, but most others do better. Your nos. are based on too many parameters which are not static. And mostly, the problem /issue is class. Prosperity will take care of most problems, but socialsim/ stagnation will probably cause societal breakup over time, IMO.
Non-european whites are included in the imaginary group “non-euros”. I think since they are such a small minority that this simplification shouldn’t be a problem.
I fail to see how intermarriage will significantly shift the demographic one way or the other. If anything, the effect of intermarriage will *SLIGHTLY* favor the imaginary group “non-euros”.
I agree with your comment about prosperity.
Thanks for your input.