From what I have read, I don't believe all want to go to that extreme, but one need only look at left wing, Democratic strong holds to surmise the objective of some.
Check out this map. California gun ownership is at 20%, and the North Eastern Seaboard state are all the lowest gun ownership areas in the U.S
Here's where you're most likely to own a gun
R.I 5.8%, NY, 10.3%, NJ 11.3%, DE 5.2%
Compare that with AZ, AK, ID, WY, All well over 50%
I suppose it's almost more about the state rules about gun ownership as well as ownership numbers. Open carry vs other laws. In Ontario for instance, if you own a gun, it must be locked up unloaded, and the bullets locked in a separate location. In essence, if someone is breaking into your home and is armed, you're in trouble.
Also, if you do use your gun, you had better hope the intruder has a gun also. If they only have a baseball bat with spikes on it or a 16" knife, you will be charged with a crime for "excessive force". Compare that with many U.S states where you can carry one with you where you go and your home is your castle.