Should Christians just cave in and admit that Genesis is a myth?
I know you have said that reference to this sentence is quote mining, and I'm not trying to misrepresent your position by quoting it myself. But it does raise an important point for me.
Personally, I have absolutely no problem with someone believing that the Genesis story/flood story/other OT stories are correct, and that science must in some manner have it wrong. That's your right.
I also don't have trouble with children being taught those beliefs in Sunday school, or through other Church/Mosque/Temple routes, or through family upbringing. Again, for me, choosing to bring up your own children in your own faith is a matter for you (unless you try to train them to harm other people, of course).
Where I do get shirty, (not a typo - it's an English expression, meaning annoyed), is where people try to teach religion to children in schools and call it science; or try to alter or undermine science to add weight to their beliefs. The pursuit of knowledge and advancement is way too important to our future to endanger it in this or any other fashion.
Believe elements of science are wrong - that's your right, and I defend it - but not at the expense of undermining the incredible importance of maintaining the integrity of science.
Could there be any greater conceit, than for someone to believe that the universe has to be simple enough for them to be able to understand it ?