Does that mean that Beirut will need to be liberated from the Muslims?
No, it means that they just want the Christians out of Syria. Beirut used to be Christian majority, so these Islamists figures that they can go there. As for the Alawites, the Islamists want to annihilate all of them.
Assad is not good, but it’s interesting that his grandfather could sum of the Islamists well: “The spirit of fanaticism and narrow-mindedness, whose roots are deep in the heart of the Arab Muslims toward all those who are not Muslim, is the spirit that continually feeds the Islamic religion, and therefore there is no hope that the situation will change.”