Not true. And statements like this only make it worse for a suicidal person. Christians don't realize how damaging they can be sometimes. If you are in God, you don't lust. You don't steal. You don't murder in your heart (hate), you don't kill, you don't hurt others, you don't have affairs, look at porn, envy, etc etc etc. Guess what though, Christians struggle with ALL of those. Everyones demons are different and everyone has their problems. When you become a Christian, you are not perfect yet. Your struggles don't just vanish and life is apple pie.
So how dare you to claim a person who thinks of suicide is not of God! And think, if a suicidal person is in emotional distress and feeling hopeless already, and maybe the only hope they cling to is God... but then someone says a suicidal person is not of God... what hope do they have left? It's an emptiness you cannot imagine and only brings them lower.
Suicide is definitely something that should be talked about more in church. So sick of so many ignorant Christians on this subject. There are deep complicated reasons that lead a person to suicide. Blessed are the poor in spirit for theirs is the kingdom of heaven. And no one is more poor in spirit than those on the brink of suicide.