One big difference between Dems and Republicans, as illustrated nicely by this post, is that the right seems to always be waging a war against the 1960s.
I wasn't alive in the 1960s. The issues that I'm concerned about are the issues of today. The advocacy I engage in is for the future, not to try to rewrite someone's opinion of the past.
It's no real surprise that young people have departed the GOP in droves lately. I'm 31, and I'd guess there are a lot of under-40s who can't for the life of them figure out what the hell the GOP is all about these days. The 60s? That's so... 1969.