The GOP already altered their coalition in 2016 and it worked: they recaptured the White House. Republicans are doing fine.
Well yeah, it worked for 2016, but with rapidly changing demographics it's going to get eons harder for the GOP to win in the future if they continue to alienate minorities through Trumpism.
The Hispanic vote was 11% in 2012 and 11% in 2016. Doesn't exactly seem rapid to me.
You kind of just proved my point. The latino community is the second largest ethnic group in America and it's growing fast, by 2050, we are projected to have a minority-majority. If the GOP can't increase their vote share of latinos, they could lose states like Texas and Arizona.
The problem with that is Texas Hispanics tend to assimilate into Texan culture and vote more Republican than e.g. California Hispanics.
No, Texas Hispanics who arrive there Generations ago assimilated over time, especially in the north part of the state. 1st and 2nd generation arrivals are being assimilated no more rapidly than California brethren.
More to the point, assimilation doesn't mean turning Republican. Asians have proven this.