Biden wants your guns

Because as we all know, SWAT teams become entirely out of options when you point a gun at your door.

A large caliber machine gun is not just a "gun," and SWAT won't be the first ones to knock. Yes, the person behind the gun is a dead man. But who's going to volunteer to be in front of this thing?

Fiber optic wire goes under the door to get a visual, find ventilation to send tear gas in, come in through the window, neutralise all personnel, then put the safety on your large caliber machine gun. Then you get to explain to a judge why you weren't complying with law enforcement. Katko v Briney 1971 is an example of how your 2A defence would let you down in the aftermath of this hairbrained scheme.

Katko v Briney is a 50 year old decision, and many decisions have been made since. In addition, in Katko the property was unoccupied. That case references defense of property, not self defence.

The rest of your post assumes foreknowledge of the presence of the weapon. It could work out that way, as it is unlikely that sherriffs will go door to door asking if you have any guns.

In the end, there will be no disarmament without bloodshed.

You're gonna kill law enforcement officers? Aren't you guys all "blue lives matter"? Of course it's ridiculous to believe anyone is coming for you guns... who do you believe would show up at your door that you would be so willing to murder them?

Wow, do we really have to go through every gun argmuent that has ever occurred and repeat what has already been said?

I do not want to kill law enforcement. I don't want to kill anybody. If the government passes a law that contradicts the Constitution they will use law enforcement to enforce that law, regardless. Some law enforcement has already stated that they will not enforce legislation that abridges 2A. I will not target law enforcement, ever. If law enforcement were to try to take away my weapons, I would defend my right to own them. Unfortunately, that could result in death or injury to those wilking to enforce the government's will.

Biden has said that your gun will not help you when the government sends an F-15 (old tech, are they even in service anymore?) with a hellfire missile. As if the government is going to waste jet fuel that way. That's not how it will happen. When the government wants to take your rights, they'll use the legislative process to pass a law and then send men with guns to enforce it.

2A protects the people from the government by requiring the government to consider that behind every door might be a big damn gun.