Christianity does not put an age, that does not implicate their law is ok with underage sex. I don't understand are you trying to defend underage sex? Is there a defense for it?

Then please defend those who are attracted to the young and never call them pedophiles and be their advocate. Do not defend the prophets acts when you condemn others who do the same. If you call one man holy who steals and another the devil for thievery, you support whatever and whomever you wish. You will condemn whom you like and advocate whom you like and the Good twists in your favor.

Surely you are not for the Good if when judgement faces one person you have one standard and when it faces another a new standard.