I also tend to think that the two are closely linked, one just
uses a slightly different justification for their empire
building. I also was surprised at the idea of Americans
treating the Filipinos well, I've read a good bit that points out
some of the very ugly atrocities the Americans carried out against
the Filipinos. In fact, "Fly Boys" by James Bradley does a
great job discussing some of the policies that the US pursued in
their colonial efforts there.
The atrocities were during the initial fighting against
Aguinaldo. I was talking about things that were done later
on, after we had colonized them. My sources for that are A)
Karnow's In Our Image and B) the impressions passed down
to me by my father who is a native Filipino born in 1936. He
was too young to remember much, but he has told me about the
attitudes of his parents and neighbors... (those might have
been colored by the war, though).
Also, we had already promised independence to the Philippines
even before the war. None of the European countries did that
for their colonies.