No one is being forced to believe anything, so don’t worry about it.
Secondly, it’s not charitable to claim another believing person’s beliefs are not rational.
I could see you saying mine are not rational, but really! Your own beleving sisters and brothers? Even if you disagree, you have to realize they don’t think it is the least bit irrational. Give them the benefit of the doubt they sincerely believe as they do.
It would be better to say, I don’t agree in this doctrine because XYZ.
But, just dismissing it as not rational, that is not helping anyone see your objection at all.
I personally think your use of emotional appeal, and later statements don’t do much to prove it is irrational at all. It’s no more irrational than Lot and his daughters story. I mean, I think it fits perfectly within rational if you compare those two events.
Anything goes with God after all.

I really wish that horrible story about Lot was not in the bible. It makes me sick.