This might be a Flame Request I guess.
The objection to any form of birth control derives from a quaint little middle eastern custom from ancient times. It went something like this: you are a member of a tribe; you are at war with other tribes. If you lose - game over. If you win, you kill all the men, the women, their children, and animals and salt their fields - game over. Either way, you need to grow more people to fight the next tribe - thus ANYTHING that stops new little ‘soldiers’ from being grown is a Bad Thing. Best way to ‘freeze’ this injunction into the culture - stick it into the religion - task over.
“Better to cast thy seed into the belly of a whore than to leave it on a barren rock”