OP is nothing but calling out a hypothetical scenario that's rehashed thousands of times on gun boards with the same response. Of course gun owners aren't going to want to give up their guns, just as smokers don't want to give up their cigarettes, drinkers their beer, drivers their car, etc... It's intentionally evoking an emotional response, ie; "trolling"
It's clear the politics forum isn't for you then. There's going to be debates in which there are differing opinions that evoke emotional responses. That applies to every thread in the tinderbox.
The argument of fighting back against tyranny in government is very common when debating the second ammendment, wouldn't you agree? Asking at what point would it be okay to exercise that right isn't trolling.
"Would you let the communists rape your daughters" on the other hand, is trolling. Next.