Only thing world community and many Americans would be concerned about is another Iraq like crisis. I would say the best way is to go through UN and the countries who are behind Syria (Russia). The way Syrians were pushed out of Beruit (Lebanon I mean) would be the best strategy to replicate. Look for an opportunity and pick the tyrrants out from everywhere in the world. G.I.'s and Syrians in Tense Clashes on Iraqi Border - New York Times:
In a meeting at the White House on Oct. 1, senior aides to Mr. Bush considered a variety of options for further actions against Syria, apparently including special operations along with other methods for putting pressure on Mr. Assad in coming weeks.