I feel the biggest thing is that people are ignorant and misinformed about guns in America, thier purpose, intent, and history.
I would make attempt to open with a few qoutes of the founding fathers , so people can understand what thier rights are and why they were put into law to begin with. and the numerous historical exsamples of what can happen to a disarmed population. You could make the case that people who are pushing for hard gun laws are anti American and moveing against the constitution . They are attempting to change the very laws they swore to defend and uphold. The founding fathers had determined that self defense is a natural right , and that all liveing things have that inherant right to self defense that no legitimate law/goverment can take away .
founding father qoutes:
Gun Related Quotes from the Founding Fathers
results of gun control in the 20th centry
Paul Harvey on Guns