The problem here is that anti-gun people are like most people around, say, spiders.
Spiders are not some inherently terrifying evil that gives you the heebie-jeebies. They are something that, to many people, is completely unfamiliar and alien and potentially dangerous. Those who are actually familiar with them, study them, work with them, know that simply isn't the case. They can be fascinating, versatile, and as long as one is careful they are really quite safe to have around.
Most of the anti-gun lobby comes across as incredibly illogical - they don't want guns, because guns creep them out (usually because they are unfamiliar with guns!). They've built up this conception in their mind about what a "gun" is, and refuse to be swayed. Now, the other side certainly does that as well, builds up a mythology around the weapons, but neither side is likely to be dealing with anything approaching a logical view of the situation. However, only one side wants to restrict the rights of the other, and only one side is awash in a completely irrational fear that they want to spread. Their arguments aren't even directed at the right things, most of the time. If they were just worried about, say, deaths and the like, they should be leading a campaign against private swimming pools, which are, statistically, a lot more lethal than a house full of guns. But they aren't part of a campaign against violent deaths, or murders, or anything that could be construed as logical. Every one of these people I've met in real life has had pretty much the same motivation - guns make them inherently uncomfortable. They don't like the idea. They want guns gone because the very idea of guns is unfamiliar and scary to them.
I am, quite simply, opposed to any governance based on irrational fear.
I ALSO believe that culture has value, and I can understand why groups like the NRA react the way they do. Guns are important to many groups of people culturally, guns are great fun, guns are collectors items, guns are hobbies, and guns are traditions. And when they see someone pushing to take those things away from them... well, their response seems a lot more rational. The groups who seek to legislate against it almost never take this into account. They just don't care.
(for a similar sample where I side with the lib'rls rather than the cons for the same exact reasons, see gay marriage. This is part of human nature, not restricted to either "side", as if the concept of "sides" were reasonable. It's found everywhere, and I will remain opposed to any policy based on it.)
Finally, it IS in the consitution, and that DOES mean something. We don't have a democracy, we have a constitutional republic, and that's because the masses(and/or politicians elected by the masses) love to be stubborn little dictators when they think they can get away telling other people what they can and cannot do, and the founders did not think that was alright. I agree with them. If you want to take rights like this away from people, you better get your shit together and do it right instead of trying to say it doesn't matter. If it didn't matter, well, you can amend the constitution and take it out.