If we're going to use this kind of logic, you should probably consider that pride and murder are also sins.
You have no idea what you are talking about.
This is literally the worst possible thing you can say to someone who is suicidal.
You're a terrible person, and you should be ashamed of yourself.
That's not a great thing to say to a person either. Suicidal or not.
If you said to me "Hey, I cut my hand really badly, and I'm bleeding quite seriously. What should I do?" it wouldn't be correct to say "do not be a crybaby." The right answer is "Go to the hospital and get some stitches."
It's the same with mental issues. They're a wound like any other.
My parents said it to me and we say it among friends, there are even burger commercials saying same thing.
Maybe that is the thing to say. Change venue and toughen up.
http://hyperboleandahalf.blogspot.com/2011/10/adventures-in-...
http://hyperboleandahalf.blogspot.com/2013/05/depression-par...