I know the term is not en vogue these days, but I truly believe that people who choose to partake in the generational blame game are functionally retarded.

We are all homo sapiens. In the nature v nurture dichotomy, the emergent bulk properties across generations are clearly a result of the latter. If we see specific behaviors that ultimately prove to be problematic, we need to think deeply and compassionately about what the causes could have been and, to the extent that we are going to engineer society, attempt to account for those moving forward.

While true about all being homo sapiens and shaped there is still fundamentally rightful to blame from causality.

Even with the nature and nurture given the nature of time the past generations have an impact on the future generations.

With power comes responsibility - blame should be proportionate to power to have actually prevented something. It is far more reasonable to blame a doctor for not even trying to save a wounded stranger than a blind quadriplegic because the latter wouldn't have been able to do anything more than give a redundant call for help. Blame is also fundamental to systems.

What do we call people who dislike being categorized in any way, yet insist on categorizing everyone else? It's always "us" and "them" and all generations participate.

Every teenager rebels against their parent's generation. It's not increasing nor decreasing. The Internet might make it more divisive and make the multiple (and sometimes partly overlapping) generations more obvious. But otherwise it's all just the same as it always was.

Related Aside: I worked for a while in a country (kingdom, actually) that is very religiously strict. One of the things I noticed very early on, and struck me as creepy-odd, is that the adults and teenagers were all listening to the same music. Everyone was listening to the same things. No individuality. Brain washing, probably...

Don't ostracise people based on age, experience or situation for starters?