I agree with what's been said by many: Guns are not the problem, but people. Crazy people.
I am not sure what guns this man used to do the killings, but likely a handgun was part of it because he was dressed as a policeman, wearing the uniform, and one would think that a handgun is part of that uniform.
If he did use a handgun, you can be certain that this will add a great deal of fuel to the government's agenda of banning handguns and semi-autos.
Maybe this man had a mental health problem. Maybe he was just a complete a$$hole. Maybe both.
Whatever, there was no need for him to kill all those other, innocent people. He could have taken his own life, get that over with, but why do it like this?
Hard for most of us to understand. The problem is that while there are rabid animals like this who can access firearms and do these atrocities in our society, we law-abiding gun owners are going to face an uphill struggle hanging on to our firearms. Why? Because the politicians and the general public will lump us together with this psycho, and paint us all with the same brush. To them, anyone with access to guns will be a potential mass murderer. So, the only solution they see is to disarm everyone.
This is what happened in the UK, Australia and is happening in New Zealand. I very much hope it does not happen in Canada, but with mass shootings like this, we are headed down the same road, in my opinion.
A few crazy people will screw this up for all of us.