There are some laws passed in Christian dominated countries or communities that force non-Christians to conform to the views of Christianity.
There might be a difference between views which are theological beliefs, and views about how we need to behave. I understand that the United States Constitution says the government may not make a law about a religious matter, which I think means what people must practice in belief and worship, specifically. But we do need regulation of behavior which can effect others than our own selves. Plus, we do need to have regulation about what is best for our own selves.
"Of course", it is for our own good that we have correct beliefs and ways of worship
But the Constitution says no to regulating this.
Are you not concerned it could cause resentment?
Well, if you tell your child no, about what is for your child's own good, yes this could cause resentment. And, even, there are children and teenagers who can scream how their parents "hate" them, because their parents are regulating what is for their children's own good. And, like this, yes . . . if you have regulations which are right, there will be people who will resent regulations which are needed.
Should Christian customs not only be enforced amongst Christians?
I think there is a difference between what is only a "custom", and what is for a human's own good. For example, I do not think that outlawing "social" abortion would be a matter of only "custom". There can be various sorts of very degrading and ruining stuff, included in the process of what I might call "social" abortion > meaning when a young pregnant mother gives in to pressure of family and peers, to kill her own unborn with whom she could learn how to love > she is giving in to people who do not know how to love and support her, plus not learning how to love her own child > this can be very deeply ruining. So, this would not be only an item of "custom". "Of course", if someone obeys a law against "social" abortion, the person can obey in a very wrong way damaging to her child, later.
So, we need right laws to be obeyed in the right way, with the attitude of doing things in a good way. And, for one example, if one obeys the law against "social" abortion, this needs to be done with other people helping her and encouraging her.
Abortion.
Gay marriage.
Monogamy.
Sodomy.
Sex under the age of 18.
These involve very personal behaviors, and these behaviors can be with people not committed to one another - - not committed for a lifetime of finding out with God through Jesus how to love one another. And Christians are concerned about what is in the culture where they will be bringing up their children; because people who have the character to do these things can be influencing and effecting their children, in schools and as police and medical people. So, it is not only an issue of outward customs, but the character making one able to do these things, and how that character can effect how someone is relating with the children of Christians.
Mercy killing (human euthanasia)
Suicide.
If someone decides there is no one worth staying in this life to love, this is not only a problem of custom. If a person comes to the point . . . after a whole lifetime of living on this earth and developing to become how that person is now . . . and the person has become able to feel he or she is not worth having in this world . . . would be worthless and not worth others caring for that person . . . I would say this is a problem much more than a problem of "customary practice".
I don't think pain should be what decides what we do.
If we have not developed family love so we can accept help and sharing with family members at a point when we can not take care of ourselves and be "independent", this is a problem. In the United States, I would say, independence is an idol for many people; and the worship of it has resulted in much personal and social degradation, so now many people would rather die than be cared for even by ones who dearly love them.
So, this is not only about outward custom or behavior.
But you can't make laws that can make people love