When death strikes

Ok, it is Christmas time and no one would ever think of death in this time...
Everybody is just having a relatively good and maybe peaceful time right now...

This morning one of my former collegues called me to tell me, that one of the CEOs of the company I used to work in until September had died just two days ago...
One day before Christmas.... He leaves a wife and two children...
He was about one year younger than me...

What had happened...?
It is said, that he just suffocated from...well I do not know more details but he suffocated.
Strange thing to that is, that last week we've had an argument, because he had freshly annoyed and insulted me a lot with an e-mail that was a normal spam mail with one of these typical offers ("You need money? Join ourt team! Earn $4000/month only by being German and having a bank account!") He forwarded me this mail with only one question in it: "What about this for your work?"
I will explain, why this annoyed me so much:
I left the company, because of the fact, that they wanted to pay me 15% less of wages. They had run the company down and now the workers had to pay the price. I refused to that and he offered me to be dismissed if I did not accept the decrease in wages...which I did.
When he sent me this mail last week I told him honestly what I thought about it...and the first time I told him, that he was the reason for me to leave the company...
And now he is dead (*frighten)...

All this is very confusing...
So many questions run in my head...
Should I have backed and tried to reconcile within these arguments we had (It was only via E-Mail).
Of course a death is always shocking, especially, when the relation to the deceased was not very positive. But no one ever can expect something like that...
And I found it hard to be told to try a shady job when I would need money (I am unemployed right now), just only because I left the company a few months ago...

I cannot describe my feelings...

I am so confused...