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.
Which is exactly why they would make sure it never reaches a jury. ICE will ensure you do not live to present your self-defense claim
You talk as if they aren’t untrained cowards who only face the unarmed.