I google it and I see it. You link it and everyone that reads the thread sees it.
Besides which...that's just some quest text from the alpha. There's some counter arguments about the setting of some of the zones and quests that STRONGLY suggest Zul'jin taking over as a loa and uniting all the trolls. There's all kinds of spoiler talk about BfA quests and lore in this video, and the guy makes a REALLY strong case.
Does that suggest troll paladins? I don't know. Maybe? Maybe not. All I know is that there's a LOT of time between alpha and future content releases that could change t he situation. Given Blizzard's propensity for changing their mind, it's entirely possible it could happen.
Video is roughly 20 minutes long, but WELL worth a watch if you don't mind spoilers.