When you coined your phrase "foreign barbarian hordes of wicked invaders..." and tied it to the Alamo I took it that you were referring to the Old Three Hundred https://en.wikipedia.org/wiki/Old_Three_Hundred so perdone, por favor. After 250 years of the melting pot effect it should occur to everyone that at current the so called melting pot is a pipe dream as absolutely divided the entire nation actually is. As for adopting someone else's culture one should remember that from 1492 to 2026 is 534 years of Hispanic culture in Texas and the US is celebrating it's 250th birthday. So erasing a culture with over twice the history of your own may be impossible. In fact you may try as hard as you can but i know for a fact that in Scripture God divided the peoples languages/cultures himself and you and your melting pot Babylon can try to undo what God did and will never succeed.
I just mean the example of the Alamo in general, we'll fight them to the death if we have to. They might as well perish their thought about trying to invade and conquer my nation along racial lines, or else they would be wise to depart in peace now from my lands and go to the failed lands of the culture the Lord Jesus tore out of their hands before they are made to depart in the pieces as a testimony against their deceitful hearts' desires. The mingled peoples of the isles of the sea will not be divided on race and we will resist the king that comes to try to conquer us it is written.