I don't enjoy discussing age of consent and adjacent topics, because even the most academic purpose forces one to tangentially defend nonces.
>Vikings.
Irrelevant. People used to filet their enemies alive as punishment, and I also don't support that.
>Your frame is simply dishonest.
I might be wrong about various things, but at no point am I dishonest.
>demographic territory competition
Phenotypic r/k expression is a real thing. There are many ways to solve the reproductive imbalance it potentially creates that don't involve defense of child brides. To name a few (not even supporting all of these, but it's top of my head): stop dysgenic social policies, stop incentivizing broken homes, sterility treatments for people with too many kids and criminality, deportation, segregation, actual enforcement of law as written rather than anarchotyranny, etc.
>Sharia
Many ways to skin that cat as you can see above.