When I first read the title of this thread, I thought it said; NO priest commits ѕυιcιdє at funeral.

This would not surprise me at all.

There have been several ѕυιcιdєs (I lost count) committed by N.O. priests after they have been accused of sɛҳuąƖ abuse of boys or girls, drug running, embezzlement of church funds, and/or gun running. Without the true faith, these novus ordo priests are doing reprehensible things, and then they take the coward's way out by ѕυιcιdє when caught for the crimes they have committed.

Lord have mercy and save us.

Wrong. Define "mental illness", and who gets to "diagnose" the "mental illness"? Most of the "mental illnesses" are false constructs to excuse behavior and enslave people to a pill and get them data-mined on a state registry so their liberties, such as exercising the 2nd Amendment, are prohibited.

ѕυιcιdє is a sin against the Holy Ghost. The person suffers eternal perdition.

It is God who decides what mitigation if any comes from the mental illness of a ѕυιcιdє. Another thing is that if the ѕυιcιdє comes because of the hatred of others then those others also share in the culpability for the ѕυιcιdє.

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Apparently it was all a fraud [that?] the NO priest said God forgives even ѕυιcιdє.  

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Since even poche forgives ѕυιcιdє, what else matters? 
Most people who kill themselves think it's no big deal and God will forgive them. (BTW that's presumption, a cardinal sin.)

A person I know was being medicated for depression and suicidal thoughts. After conversion to tradition and learning that ѕυιcιdє leads to Hell they no longer consider ѕυιcιdє an option. Though still taking meds for depression, the temptation towards ѕυιcιdє has been removed due to the understanding of church teaching. I think the renewal of teaching on the subject may save other lives as well.

If ѕυιcιdє is "mitigated" due to mental illness, then exactly what ѕυιcιdє is not mitigated?  Do we really believe that a sane person would take his own life?  

And if all ѕυιcιdєs are due to mental illness and therefore should be mitigated, then doesn't that also mean that the Catholic Church taught error for hundreds of years?

Surprised that people argued against what poche said.

... But the other two, (sufficient knowledge, and full consent of the will) we don't know. God may have granted a change of will in view of our later prayers.

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God does not change our will. Our will is our own and ours alone. We are the only ones who can operate it. It's called Free Will, and is a tenet of the Catholic Faith. God does not take back His gifts.
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And how could you ѕυιcιdє without sufficient knowledge. Would you ask yourself "Will this action cause my death. I think I'll give it a try?"
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What Pax said is correct. God does not give us more than we are able to bear. As Catholics we must believe and remember this.

My cousin committed ѕυιcιdє but mental health was an issue.  Apparently he had multiple concussions from sports in high school and it made him have a lot of mental health issues.  So his brain was sent of to a university for testing and he did have severe CTE.  I do not know how real CTE is but I have not heard anyone claiming it does not exist.  My sspx priest told me I could go to his novus ordo funeral, I told him what I knew at the time, which was that he had concussions and that was the suspected cause of his mental health issues.  He grew up in a upper middle class household, going to expensive private novus ordo schools, and lived a normal life.  Most likely he never returned to the faith, never giving a confession before he died.  I most likely assume he had premarital sex etc, but he was a baptized catholic, who killed himself but what fault was truly his?...   
I am totally against ѕυιcιdє, I would bet my life savings he is not in heaven, but I do not know for sure.  ѕυιcιdє in the modern age is very tricky and complicated.  

So long story short, I went to his funeral, which had over a thousand people attend (his father had a lot of business associates).  There were 3 or 4 novus ordo priests at the "service"; at the "sermon" the "priest" said my cousin was in heaven and he had left his pain in this world.  He said he was in heaven multiple times.  We left the service and waited until the end to go the a luncheon at he church.  

Did I do the right thing?  I do not know, my priest told me I could go, and I do not know for a certainty he was not insane, or not in sanctifying grace.  

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Since even poche forgives ѕυιcιdє, what else matters?
Most people who kill themselves think it's no big deal and God will forgive them. (BTW that's presumption, a cardinal sin.)

I do not forgive ѕυιcιdє. Only God can forgive sins. There is anecdotal evidence that God may have accepted the contrition of those who committed ѕυιcιdє. But who are those whose contrition that god accepts and those who God rejects? Without a special revelation from God we can only conjecture. maybe we would be right, but then maybe we would be wrong. In this case I think it would be best to pray for the eternal repose of their souls and leave the rest in the hands of God. Remember, one day we will all die and have to stand before the judgement seat of God. will we be saved? Or will we be lost? maybe we will need to spend time in Purgatory. In this case because I would like for others to pray for me I pray for them that God's judgement of them be a merciful one and that their time in Purgatory be a short one, just as I would like for my time in Purgatory to be a short one also.