I like Tulsi Gabbard, she has that strange disposition of speaking truthfully. She has just recently dumped the Democrats as she sees them as the war party in the US.
Now as far as testing nuclear weapons on someone elses country, there is an ugly fact you have not comprehended, the bigger a country is physically, the harder it is to nuke all of it. Whack Italy with one of the big US or Russian nukes and you would fry everything from Malta to Scandinavia.
Try it on a big country, the US, Russia, China, India and even though the damage would be massive, there would be areas that were barely damaged. OZ is a big place, you would empty a nuclear arsenal and not nuke all of it. A distant hostile place is no joy to attack, the Japanses found out in WW2, they tried bombing the phuk out of Darwin but could not get any further. It was well known that the did various landings on parts of the north west coast but the local indiginous people ate them.
They tried the overland approach via New Guinea and got their arse kicked. Then the US entered the war and they got pushed back to Tokyo.