Right, because Hispanics will always trend Democratic even though they voted 45% for Bush just five years ago. The only current minority groups that the Democrats really have a stranglehold indefinitely are blacks. Of course the point about the suburbs is obviously valid now, but the idea that Republicans are doomed because non-anglos are growing is extremely presumptuous.
As long as Republicans take a nationalist approach to immigration and the related issues (i.e. English as the official language, zero tolerance for illegal immigrants) they will continue to lose ground with Hispanics and Asians to some degree. Bush was more popular with Hispanics than your average Republican because he had a record of promoting compromise with regards to immigration reform, he speaks Spanish (I think), and he has Mexican-American members in his family which certainly didn't hurt him. He also came from a state with a large Hispanic population and he catered to them during his runs for governor.
Bush is atypical when it comes to Republicans and Hispanics. His support amongst this group is solely evidence of his personal popularity amongst Hispanics. He is the exception, not the rule, when it comes to the current GOP and their performance amongst Hispanic voters. The GOP's real (or perceived) positions on Hispanic-related issues are different enough from the positions Bush espoused to discredit any claims that the Republicans can make to being competitive amongst Hispanic voters.
