republicans are more dangerous than Al-Qaeda [...]
is this a fair and accurate statement?
It probably is -- mostly because you're setting your bar so low. After all, Al Quaeda isn't all that dangerous in the grand schemes of things. Many everyday hazards are more dangerous than Al Quaeda, even though we don't lose any sleep on these.
For example, cars kill more people than Al Quaeda by running over them. Guns kill more people in accidents than Al Quaeda. In turn, as the NRA correctly points out, swimming pools kill more people than guns do, meaning that swimming pools are more dangerous than Al Quaeda, too. Finally, businesses let more of their employees die in work accidents than terrorists kill in their plots. I could extend the list considerably.
With all of the above in mind, my best guess is that Republicans are probably just a little more dangerous than terrorists. By opposing safety regulations for swimming pools, guns, and workplaces, they probably cause more Americans to die than terrorists do. But not many more. As I said, terrorists are easy to beat in a competition for dangerousness.