So what would be the rationale for everyone in a movie theater being armed opposed to everyone at a Trump rally being armed?
Considering the commonly held belief of gun enthusiasts that every citizen who owns firearms have passed a background check of some sort, so they must be considered responsible owners.......right up until the moment they aren't.....AND the fact that gun enthusiasts also generally believe that to restrict when, where and how firearms are worn as adornments and a part of accessorizing one's clothing choices for the day is part of the slippery slope to having guns being taken away wholesale, I see that arguments of convenience is a well played game of hypocrisy on the part of some avid gun enthusiasts.
Common sense is usually the tool of choice for the average person who is faced with making those daily decisions that are a part of living one's life. However, as we have repeatedly seen how some gun enthusiasts will shed this logical course of action and become over-reacting paranoids when it comes to hanging on to their beloved cache of killing tools, I submit to you that you need to cease and desist any line of discourse where the mere hint of a threat to one's right to bear arms in any abundance imaginable is laid out at their feet.
It is at this point where logic and reason is tossed out the window and manic panic is put in its place. So sacred is the belief that to give an inch in a moment of clarity is to give away the untold miles of "progress" made in bringing new meaning to the Second Amendment, that the salient reasoning for reducing/eliminating the increasing amount of mass killings of our children and loved ones is absolutely no reason to add a single well-meant restriction that adds fuel to the slippery slope theory of torching the Constitution and Bill of Rights.