"Keith thinks that outlawing guns wont stop bad people from having guns."
As crimes in general are not prevented by laws, perhaps we should consider abandoning all laws   
"This shooter didn't have criminal intent "
I should imagine Joe meant that he wasn't killing people in order to carry out a crime - what he did was a criminal act in itself, but his intentions are immaterial anyway - he was obviously 'not the full shilling', nor was he, as far as we know, part of a master plan - he was a hatred-driven, delusional fanatic apparently acting of his own volition - plenty of them about.
Whether he will be tried a a criminal remains to be seen
Incidentally;
"There are more registered guns in circulation in the UK than there is homosexuals."
There are 1.8 million registered gun owners in Britain - it is calculated that there are 3.8 'out' homosexuals - nobody can even guess hw many closeted ones there are.
Your maths are worse than mine.   
Jim Carroll