@snood,
The R's are not ignoring the changing demographics but Trump is doing what he is doing because he knows that the Hispanics do not matter to the R's this cycle. The R's will have to do something eventually but they do not need to do anything now. The primary reason is that they intend to drive up the white vote this time, and whites are increasingly abandoning the D's. There are a lot more Whites than Hispanics. for instance Colorado is often touted as a heavy hispanic state, in 2012 they were 21% of the residents, but they were only 14% of eligible voters and in recent years eligible hispanics have been turning up on election day in light numbers compared to other races. The only people that count are those who cast ballots, a concept that D's continually have problems with. How can you look at the rise of Trump and Carson in particular and not conclude that a lot of whites are going to vote this time how have not done so in recent years? The white turnout has been shrinking for at least a decade, there is tons of room to grow the white turnout.
I know that you live a sheltered life, all you have probably seen are the pieces that go something like " The Repubs are shooting themselves in the foot with hispanics, they are so stupid!" , based upon the fact that the R's were expected to court the hispanics this time and completely gave up on that idea. The reason was that the rise of Trump/Carson/Sanders means that they dont need the hispanics this time. They kicked the can down the road. There are also a lot of pieces about how the R's are making it harder to deal with getting hispanics by how they are acting right now, which I doubt but even if it is true Trump is only nominally a R anyways, he is much too centrist for them, he is not going to go out of his way to help the R party with their long term of appealing to Hispanics. He is going to get the 30% of the hispanic vote or what ever he needs but the guys down the road are going to have to figure out for themselves how to get more than that when they find themselves needing more than that, which they will.
How many times have we heard D supporters say " we are really going to smash up those stupid Republicans this time!".....when the reality is that the R's have been steadily gaining power over the Ds for a decade? There is a basic failure to track reality right there.
Now since all you are interesting in is getting told that you are right, since you are not interesting in finding out how closely your beliefs cling to reality, I will move along. I really would like to see you up your game though, you could be a smart guy if you put some work in.