wrong. the old gods despise the burning legion. they destroyand take away their toys.
the old gods were planning to have illidan reverse the portal sargeras was using NOT planning on letting them through. had their plan worked the portal wouldve opened up to the old gods prisons and instead of sargeras coming out of it they would.
xavius only became under old god influence after he was abandoned by sargeras. same as azshara.
again as ive stated many many many times. azshara HOLDS GRUDGES. who would she have the most hate for? the man who not only stood her up on her wedding day but indead never intended to marry her at all. he was going to take her magic and leave.
azshara probably hates the burning legion more than anyone.