Re: didn't Trump boast "we have the guns" or something like that?
If you start shooting at border officials, I'm pretty sure that will void your life insurance policy. The treatment you'll get from Homeland Security, the FBI and quite possibly even the US military at that stage would make the TSA seem like a happy memory. You would, literally, be lucky to survive it, and if you did, you'd be looking at 20+ years for terrorism.
The US government "started" becoming tyrannical a long time ago. The word was frequently used about Bush, about Obama (by different people), and it's been used upthread in this very discussion about Trump. (I imagine it was also used about Clinton, Bush Sr, Reagan, Carter et al in their day, but I didn't get to read so many comments by disgruntled Americans in those days.) And yet this uprising you predict has yet to happen.
As for "God Given RIGHT AND DUTY" - good luck arguing that. For every Christian who agrees with you, there'll be at least two who don't, and even those who do will all want to draw their own lines for "tyranny" in a different place from yours. And atheists - and by extension, anyone who respects the US constitution - will, of course, have no truck with "God Given" anythings.