Some of the factions weren't unified correct, but most of the ones you stated were, out of those five I see three groups. The Moro people, the Pulahan, and the Rebels, also you left out a sultinate in the first group.
The Moro Rebellion was not attached to the Philippine Insurrection, in which most of the fighting was in the north.
Doesn't matter what ideology they followed, we should not have been there, it was against what our nation was supposed to stand for.
I quite clearly said "major groups" before I listed those. I was not going to try and list every single one of the dozens of groups involved. But this was not any single kind of rebellion like the US Revolution was. Think of the chaos of 1920's Germany, and you might start to get an idea. With dozens of groups all trying to rise to power.
The Philippine Insurrections were a serious of many groups, extending back to the reign of Spain, and continuing for about a decade. The rebels were generally local groups, fighting in their own areas against any US or Government forces that they saw as standing in their way. The Morro Rebellion was simply the longest of them, so some make the mistake of thinking they are seperate. But if the rebels of had their way, there would be no "Philippines" today. Instead you would have dozens of micro-countries, all fighting with each other.
And if you are not sure why we were there, you should really go back even further and read about the Spanish-American War then. "You may fire when ready, Gridley", San Juan Hill, and all the rest. Death counts are funny things to figure during this era, because you can't really seperate them from the Spanish era, the Spanish-American War, then the Insurrections and Rebellion. Spain was not a kind overlord to their colonies, and the Philippines of that era were in no way unified.One of the standard practices of Spain was concentration camps. Round up entire regions, and put them in "Concentration Camps" at night. Then anybody out in the fields or jungles at night was an enemy and you shot them.That is why we got into the war in the first place, getting their Pacific colonies was something that happened, we were not trying to gain them at all.
And much like Iraq, Weimar Germany, or many other situations, you then had groups pop up all wanting to control of the area. What should we have done, left them to kill each other off in a dozen year or more of internal bloodshed like Yugoslavia did?
You say you are not an expert of the conflict. I am not either, but I have a particular interest in this era of history (post Civil War through World War II), so have a lot of study and reading into it. You are trying to put modern thoughts and beliefs into an era more then 100 years ago, and that is a huge mistake for anybody to do. You say simply walking away would have been the best thing to do. What would the Balkans be like today if the entire world had simply turned their back on the region after Tito died, and then let all the groups fight it out amongst themselves?
We would have had a bloodbath many times worse then we actually had. The same would have happened in the Philippines.