Thanks for the info, roamer.
My sense is that “homosexualism” now substitutes as a synonyn for “gay agenda.” Homosexualism, as with communism, is advocacy of a particular philosphy.
I would agree with your impression. And if we are mistaken in the use of the term, it is understandable, as in philosophy (religion and politics included) the 'ism' holds the aggregate of similar factions (Conservatism, Dispensationalism, etc) which becomes something approaching identity, with mores, standards, and motives included - So lumping all things 'homosexual' under the banner of 'homosexualism' would be a fairly natural thing to do.
Homosexualism is another facet of the communist agenda:
http://www.uhuh.com/nwo/communism/comgoals.htm
26. Present homosexuality, degeneracy and promiscuity as “normal, natural, healthy.”