The Empire never invaded Allderaan why would they think that it would?
Alderaan has always been a focal point for resistance against the Empire. Vader himself stated that Alderaan was a hotbed for rebellious sentiment. They wanted to silence it for awhile but they had to wait until the Death Star was complete. Why? If the Empire had a fleet that could lay waste to the planet, why not use it? Well, if Alderaan had a planetary shield that made conventional fleet attacks very difficult, that'd be horrible for propaganda. They'd want a quick victory to demonstrate their strength. Enter the Death Star. One shot, one kill, home in time for dinner.
Delaware isn't afraid that the US government is going to come in and occupy it. Why? Because its part of The United States.
That's the dumbest thing I've heard you say so far...and that's saying something. No, you idiot, they're not afraid because Delaware isn't actively providing troops, money and supplies to a rebel group trying to overthrow the Federal government. If they were doing that, then they damn well would be afraid and with good cause.
got a canon source for most of the anti inmperial senators came from Alderaan? All we know is that one anti Imperial diplomat came from there.
Senator Bail Antilles - Episode 1
Senator Bail Organa - Episodes 2 and 3
Senator Leia Organa - Episode 4
Three senators, all key leaders of the anti-Palpatine / anti-Empire movement. And those are just the ones from Alderaan. Senator Padme Amidala (Episode 2 and 3) and Senator Mon Mothma (Episode 3) were both allied with the representatives from Alderaan.
He wanted to destroy a core world to prove no one was safe and they were willing to destroy an important planet.
Yeah but why Alderaan? There are countless other choices but with Alderaan being a thorn in their side, it made a perfect target. Force Leia to give up the location of the rebel base AND eliminate a chunk of the rebel leadership and support structure all at once.
We never see Allderaan attacked BEFORE it is destroyed you idiot.
Of course we don't, you imbecile. The events of Episode 4 are where things came to a head. You have Alderaan making more and more noise until the Empire decides to silence it. Best way to do that is the Death Star. If they had been attacked by the Imperial government beforehand, that would have changed everything. The shield was their biggest defense against the kind of strong-arm tactics that the Empire preferred to use.