Reflecting the question I asked back to me - is that because you can't answer the question yourself?
And how were you "made aware of" this "knowledge"?
I was made aware of all this through a website called thepathoftruth.com. And if not for revelation (from God); that is, God giving me eyes to see and ears to hear, I wouldn't understand the things taught on that site.
You're like so many people, so desperate to see the hand of God moving in the world that you literally imagine it anywhere that suits you. This was not the act of a deity. It was the act of a deranged and embittered young man.
What you don't know is that God uses men as instruments of His wrath - along with other instruments such as famine and pestilence.
He uses evil to punish evil.
Do you believe that God only sends good, never evil? Is He only a God of goodness, never of severity? Is His wrath nullified because we are now in the 'age of the dispensation of grace', as some believe?
If this shooting was God's wrath, does that make the shooter God's messenger? God's agent?
The shooter was an instrument used by God to deliver His judgment on sinners - in this case, those who take His name in vain. Is it any coincidence that the people who were killed were professing Christians, part of Babylon (the system of false religion)? Babylon, which in the book of Revelation is marked out for destruction:
'Then I heard another voice from heaven shout,
“My people, you must escape from Babylon.
Don’t take part in her sins and share her punishment.
Her sins are piled as high as heaven.
God has remembered the evil she has done.
Treat her as she has treated others.
Make her pay double for what she has done.
Make her drink twice as much
of what she mixed for others.
That woman honored herself with a life of luxury.
Reward her now with suffering and pain... ' (Revelation 18:4-7)
'...And so, in a single day
she will suffer the pain
of sorrow, hunger, and death.
Fire will destroy
her dead body,
because her judge
is the powerful Lord God”'... (Revelation 18:8)
... This is how the great city
of Babylon
will be thrown down,
never to rise again. (Revelation 18:21)