I wager though that if we grabbed a person from your culture from two thousand years ago they would find many differences comparing their experience of the culture with yours. It's inevitable that it will change and adapt over time. The only completely fixed culture is the one that has no participants any more.
> it's reasonable to reject others imposing their values on our culture.
I do agree with this sentiment for all cases with a caveat (for any given culture)
- Protection of individuals must be improved/maintained. Racism and queerphobia are two obvious examples that many of us would do well to move on from within our own cultures, and will lead to youth rejecting the culture that they are raised in (in my experience)
This doesn't need to be _forced_ on any given culture, but it will be the end result, as if a given culture refuses to drop baggage that youth find unacceptable it will eventually die.
This take is largely driven by my analysis of conservative's who claim to worship Christ, but I think is generalizable across cultures.