I've lived where guns are completely illegal, and it really is a nice feeling.
The question of rights in the United States -- on many fronts, definitely not just gun control -- is a complicated one that many feel very passionate about.
My thought as to why is that many critical points in our nation's history are centered around the struggle for rights -- the right to be free from British rule and the right to defend ourselves to accomplish that, the right to practice whatever religion we choose free from government intervention, the right to freedom for slaves, the right for those freed people to vote, and later the right for women to vote, the right to be educated, the right for African Americans to use the same public spaces as Caucasians -- struggles like these continue to this day in the United States, and the need many feel to struggle for rights and/or against any perceived oppression of rights is very real. These are just my thoughts on how things seem to be. Others might analyze it differently.