Humans are very different from one another … What one community (who just have barely enough in common to become a community theirselves) , (chances are), will not be compatible with other outside communities…

So as a practical scenario, introducing a person who doesn’t meet the minimum requirements (standards) will introduce too much stress in a community in the long run, taking into consideration that any community is already stressed because of disputes happening among their selves…

As an important side note , countries today don’t actually live as a community, but rather, under a secular regime… and even if this regime claims it applies religious laws, it doesn’t… Because it is only through the twisted eyes of the elite… The laws of religion can only be applied in a real community ecosystem where the people can only survive by serving one another in a decentralized manner…