440,095 deaths from firearms in the USA from 2001-214. Interesting number I presume you didn't extract that number from your ■■■■ and that you can cite a reputable source for it. American gun grabbers are notorious for their rubbery statistics. From memory the ever unreliable gun promoting FBI statistics page lists gun homicides which includes lawful shootings, ie police killing criminals, and armed citizens defending their lives, as well as killings by criminals, at around 11,000-12,000 per annum, which in a country of 330,000,000 is not to bad, considering a lot of those shootings are gang and drug related. So adding all those up for your time period gets you 140,000 so what's the discrepancy. Gun grabbers like to claim 30,000 gun related deaths per annum. But they lump in gun suicides. Kinda like an advocacy group padding carbon monoxide suicides to road accidents and then demanding that the speed limit be reduced.
Your 3412 terrorist deaths I take it is for the USA alone. In which case thank you for making my point for me. The effectiveness of a terror campaign is not determined by raw numbers killed and maimed. But by the terrorists ability to wear down resistance, destroy civil rights, and undermine normal social behaviour, ie going to clubs and pubs football games etc. I would say they are well on their way to winning in Britain, France, and Germany. The political elites of those countries trade their insecurities of a generally armed populace against their safety provided by security services and armed bodyguards. They will always burn candles when it only people like us that are doing the dying. The British police advise the public to Run, Hide and Tell. The mantra from the USA is more like Stand Your Ground and Shoot Back. Which do think has a better chance of ending a terrorist attack.
Benjamin Franklin once said "That the tree of liberty is nourished by the blood of tyrants and patriots. Patriots in this context meaning citizens. While true, he being a politician is applying a sugarcoating to a grim reality. He left out that the tree of liberty is also nourished by the blood of innocents. Think Sandy Hook, think Port Arthur, and also think of the innocent Muslims, that will, I believe, will be clubbed to death in the streets by an enraged and frustrated populace, first in Europe, then who knows where. But not in the USA or Switzerland or for that matter the Czech Republic, hard to terrorise and intimidate a populace that is armed.