Mandalore News

But why? Alderaan is a peaceful planet. They have no weapons.
...

Yes, but so was Naboo, but it was forced to fight. No matter
how peaceful a nation is, it will still have to fight back in
order to defend itself from other nations.

The guide to the star wars universe says that the reason they
threw away their weapons was beacause of the clone wars and how
bloody they were

Yeah that's also what I was thinking. They may be hit quite hard
from the wars and decide that from then on they'll not fight
again.

even though they live in caves, they are still pretty technologically advanced

Caves? I thought they lived in large beautiful cities in lakes and within canyons.