Wavemaker, fear has nothing to do with why anyone carries.  If you understood and had actually read the Constitution you might realize that the Constitution is there to limit gov't, not us.
4,110 times a DAY in this country, the law abiding using their legally owned firearms stop a crime in progress.  
Millions carry legally every day without incident--according to liberals, that should lead to mass slaughter, but it has not.  Now why is that?  Law abiding people obey the law, that's why.  Criminals do not.
Why to the criminals get off so lucky under liberal regimes?  The law abiding vote, that's why.  Liberal laws and policies are all about control of those who oppose.  The liberal knows the criminal does not vote.
Where is there the most crime, violence, death, rape, assault, drug use, drug turf wars?  In blue states, cities, counties, towns throughout this country.  In liberal controlled areas, where there is gun control.