Because Lebanon is, by its constitution, an ethnically/religiously fractured country, it will not in the near future (if ever) be capable of policing itself as an independent nation and defend itself against outside meddlers like Syria and Iran. Syria thinks it needs Iran and, by extension, Hezbollah to defend its "historic rights" in Lebanon. Let's separate Iran from Syria and bring it back to the Arab fold by declaring that Syria has the right to negotiate and maintain special rights in Lebanon (so long as Lebanon maintains its sovereignty). If Syria no longer needs Iran to stay in Lebanon, it may stop kow-towing to Iran and Hezbollah, stop letting arms flow to Hezbollah and Hamas and force Hezbollah to "mainstream" into the political process, and remove the Iranian threat from our northern border, and reduce Hamas' ability to stand as an independent armed force. Syria is still the key.
Magnitude 6.1 quake hits Panama-Colombia border (Reuters)
from the article: Washington: There is no place yet for Syria in peace process