Asalmao aleikoum scholars. What if a person hears about a girl that has entered to Islam and her non muslim parents will take her to a menatal hospital and will give her pills and all this stuff and the brothers laughs because that made him laugh the fact that this non muslim parents would do this things. Has he mocked someting of the religion?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

What you have mentioned in the question has nothing to do at all with mocking the religion. It is obvious that your question stems from excessive Waswaas (whispers; Obsessive Compulsive Disorder).

The treatment that you should take is avoiding whispers, stopping preoccupying yourself with them and getting carried away with them, not to ask about them, and to ask Allah to rid you from them.

It is also good to consult a psychiatrist to treat your disease of Obsessive Compulsive Disorder.

As for trying to treat Waswaas by asking so many questions and detailing the issues, then you will not be cured from it in this manner. Rather, this often increases the person affected with whispers with more whispers and confusion.

Allah knows best.