Suicide is killing yourself. Murder is taking others with you.
Green Golblin, that was my opinion until I had a long conversation about Germanwings with a distant relative who has struggled with depression over decades and had attempted suicide.
She stated that when she was in the frame of mind to suicide, she was so disconnected from reality that she was not cognisant of others. Fortunately we can't relate to this. Her sympathy towards that pilot was enlightening; an attitude that hadn't occurred to me.