Well, actually, Idi Amin apparently declared himself King of Scotland at one point. Basically, dude was completely and utterely insane. Really damned good movie btw.
Even this video's explanation is superficial. The cultural context people are proposing messing around in is so unfathomably different from the life experiences of everyone who lives in a first world country where there is... yknow... rule of law, that unless you have extensively acquainted yourself with the living conditions there you're really not in a position to suggest what should be done in Uganda or how those problems can be solved. I mean, that doesn't even take into account what the regional ripple effect would be of that kind of intervention. In assessing "what would happen if we sent in enough people to win a jungle campaign against this dude and put his head on a stick" it's hard to even know where to start. This is generally true of a lot of regional problems - Iran and the middle east generally, Pakistan / Kashmir / India, Taiwan and China, the Koreas, parts of South America - but Africa is on a whole other level of completely screwed up beyond belief.
The long and short of it is, if you think you know that X would be a good thing to do for Uganda, a) you almost certainly do not know what you're talking about, b) there likely isn't any way to predict with anything even vaguely resembling accuracy the impacts of intervention, and c) whether or not you end up being RIGHT in the end is probably a total crapshoot. Even just attempting to provide medicine, clean drinking water and food can go very very wrong very very easily. And military intervention is supposed to be on the table?
In any event the practicalities of the situation aren't what's most interesting about this so much as what I see as a sort of insidious aspect to the nature of a "social network" based movement. The thing is I don't think this dude's arguments or mine will really impact the believers because the practicalities, the realities of the issue and the situation on the ground is not really what this is about. It's about being part of a movement, whatever that movement may be. You can't reason with a mob.