The weakest argument for gun ownership in the USA

[rory_20_uk]

The invasion of a foreign power into the United States need not simply be a total invasion of all areas of the United States. Were Cuba to invade South Florida, that would be a "foreign power invading the United States" and could conceivably be either harassed or countered by a combination of partisan gun-owners, detached armed forces, and police forces until National Guard and Army troops could throw the Cubans back into the sea.

Ok...

Radar
A fleet
An airforce
An army...

Here's the timeline:

Cuba sets off in a combination of rafts, rusting ex-soviet ships and cargo containers. They are detected before leaving port.
The ones that don't sink slowly make their way towards Florida; the covering aeroplanes run out of fuel and have to turn back as ethanol has a shorter range.
When the coastguard have stopped gut laughing they inform the Navy and set off to rescue those drowning due to the capsizing of most of the rafts and ships.
The minute anything sets foot in USA waters there are already ships en-route. The Navy and coastguard, who both have more sophisticated ships and weaponry argue whether this is an invasion or whether they've just got lost and who has juristiction.
Contact is finally made - the difficulties being the lack of working radios on the Cuban ships.
Those that decide to try small arms verses the USA ships get sunk within seconds. The rest declare asylum.

The point being - they'll NEVER reach land in an organised way

What's next? Mexicans invading? The Russians finding the remains of the Pacific fleet and invading? The Chinese sneakily building a blue-water fleet, making it accross the whole pacific without detection and storming the beaches?

When you're a weak power with powerful Imperial neighbours with a vast, hostile hinterland this argument is valid. But as the world's largest power? Please...