Same here. My mother killed herself. Hugs.
My condolences to you for your losses. I have known many who have taken this solution. But please don't dismiss their problems as "temporary"...
That cliché diminishes the fact that people who succeed in suicide have gotten what they wanted, not what we left behind might selfishly want for them. Their pain--which must have been extreme, to go to such lengths--is gone now. Some have suffered for many years; some face no hope of ever reaching a "solution" other than this; and a dirty secret of medical science is that even in cases of clinical depression, 1 out of 5 can't be treated--their hell remains.
I hope his family members can see that and look more positively on his escape from suffering.