So, one group held power in Barca (the "tyrannical and corrupt" "old guard" with a "clique mentality"), Aurvandil wanted a different group to have it (the "newer nobles ostracised as troublemakers and traitors"), the current Barcan leaders refused it, and war. Sounds legit.
Absolutely; it's one of the more nuanced war reasons around.
But it's still no moral high ground.
