Only one of those is true, the other two baseless.
1. The Sunreavers didn't "betray" the "neutrality", especially if Jaina broke it first by aiding the Alliance by giving them a WMD and then putting up wards to help them defend against the Horde. One Sunreaver spy doesn't justify butchering them all for giggles. It only shows that she was utterly unfit to be leader of the Kirin Tor.
2. There was no "betrayal" at the Broken Shore. A "tactical retreat", which saved many Alliance lives to boot, is not a "betrayal" just because King Chynn the Great decides to commit "suicide by Warlock". If the Horde had shot the Alliance in the back while they were fighting Gul'dan's minions, THAT would have been a "betrayal". Losing a battle against a numerically superior force and then being forced out, resulting in the Alliance having to leave because of the Legion's pincer maneuver is not a "betrayal".