How do you make a suicidal person happy? Tell them ISIS is recruiting
Would you really say that to someone you know?
I've seen the IS recruits. They are more happy than you and me.
People with mental health problems are suffering terribly, and because of the social stigma that surrounds their conditions, when someone admits that they think that they would be better off dead, it is a sign a intense pain.  To make fun of their condition does not help anyone, and suggesting that they join a terrorist organization is even worse.  It's wrong to suggest that someone kill other people along with themselves.