Jo, I disagree. They could have chosen any number of non 2nd Amendment items in their pro-America ad. A little comic relief doesn't negate it, only defuses some of the hate mail and boycotts they could otherwise face from every lunatic fringe vast leftwing conspiracy group. Give them a little credit.
They really went out on a limb to do this. Don't think the suits at their HQ (many of whom are relatively new) didn't see this, know this, discuss this, and proactively weigh the risks and rewards and adopt this commercial.
Additionaly, full commercials are usually cut from 1:00 minute to 30 and 15 second version airings soon after the initial launch and from the beginning depending on the cost of the daypart they are airing in -- they have to edit versions and this recurring theme in this particular commercial would be a natural to remove.