I don't believe that Molenga ever joined New Brodgar - My impression is that he is just a butthurt former R'Lyeh that is angry about getting his home sacked.
As to Bob Dole: Indeed, the brave Karl sacrificed his life in order for Bob Dole to escape. Bob was, in fact, one of the bravest of the entire troup - He charged into the enemy city without hesitation, knowing full well he could be locked off from his allies and vastly outnumbered. He risked his only character, not a combat alt, in doing so.
I do not at all doubt Bob's dedication to our cause, sincerity in his support, nor his willingness to fight on our behalf.