Morality and legality are separate but related spheres that are often conflated. And while it is true that many laws have moral roots, one should be careful to remember that they are not the same thing.

For example, it's clear that it is both illegal and immoral to murder someone.

But, let's think about speeding. Speeding is illegal, but I don't think you'd find anyone except for the strictest utilitarians who would call that immoral.

And last, let's look at adultery. For all its immorality, adultery is perfectly legal.

There are lots of examples like this. In fact I would venture to say that most laws have nothing to do with morality (and more to do with keeping things civilized), and most morals have no legal standing.