From what I understand about the words ethics, morals, and law, they are different.
ETHICS
Ethics are more like rules or standards set at work, they are like professional rules made so the workplace can feel comfortable and safe for everyone, like social norms, unlike laws and morals they are more philosophical i.e they are more about deep thoughts on what is wrong or right and not about laws, religion, culture or personal feelings.
For example, the dress code of a doctor is not in any law or culture; it doesn't even have to do with morals; it's all about work.
LAW
Now, laws are different from ethics and morals; they are more like rules put in place by authorities. I believe we all know what laws are so I don't need to go further.
MORALS
Then we have morals, the most important one of them and the backbone for most laws and ethics. Morals aren't just rules laid out by anyone; they are beliefs, and they can be built by religion, family, or personal beliefs. But to me, morals have to do more with personal beliefs, not even religion, family, or society. It is what one believes to be wrong or right.
So let's say an example of ethics can be what one should wear to work, laws can be how fraud is a crime, and morals can be one's belief that stealing is wrong.
Now the question; Should ethics and morals be considered when making laws in a country? Well, depending on the type of morals, people have different morals, so I don't think it would be right to make laws depending on a specific moral; if there was a way for the law to align with everyone's morals, it would be better. Just imagine a majority of people, including lawmakers, think it's not unethical or immoral for someone to dress inappropriately in public spaces; maybe to them, they believe as long as it's not harming anyone physically, then there is nothing wrong with it.
Just because something isn't ethical or moral, it must not necessarily be deemed illegal; I mean, do we know what is truly wrong from right? I feel like even though laws made on good ethics and morals are good, laws shouldn't have to tell someone what is wrong or right, we should all know the difference between good and bad without laws. What if a law was made and it is bad? As for the killing of twins, for example, does it mean because it was a law, it was ethical or moral? No!
If asked the question; As long as no crime is committed and no one gets hurt, shouldn't everyone have a right to do whatever they want regardless of how morally bankrupt their acts may be?
To be honest, everyone has rights, so it is up to us to reduce immoral and unethical acts individually. We should teach our children from small what is wrong and what is right. Because as long as it isn't a crime under the law there is nothing you can do about it. The law is never always right, so it's up to us to decide what is right ourselves.
These are just my opinions, if you think I am wrong then you are welcome to try convincing me otherwise.