Culture vs. law.... If it isn't illegal than that culture should have passed laws to protect itself or should enlist the government's aide in ensuring their values are maintained. If that means enacting laws to restrict this in the future and even retroactively have the practiced banned then they should do so.
Nonsense. You don't need a law for everything. Even if you did, you can always find some greedy lawyer to twist it your way. The United States if a good example. They make lots of rules in schools for little kids because they're too young to know better. Grown ups can (and should) be able to understand and respect other peoples values and cultures. This is sorely lacking in the "unrestricted free speech brigade" and the "total censorship brigade". The need for responsible and mature human beings is more serious now than ever.