A masked guy breaks down your door w/o an Article III warrant absent exigent circumstances? Yeah, I’d agree. Trick will be that pressing the murder charge would be federal since a federal agent dies in the line of official work (though illegal), which would give the president grounds to push for death.
That’s why if the doorkickers come your only thought should be escape. 2A rights should be exercised strategically, tactically and above all, collectively.