Well, the right-wing solution is actually "I'll be dead before then, so screw you." when you peel the onion of made up excuses and BS. Which is very strange because they seem most concerned about descendants and legacies. Just look at the whole estate tax issue: The most conservative people are the most concerned about leaving their kids the maximum amount.
I guess the future of the planet would be something that would help a lot of people of other races and ethnicities, so they are against it. But it's definitely a case of throwing their babies out with the bath water. Literally.