Overboard with Optimism?

"For," said he (Pangloss), "all that is is for the best. . . . It is impossible that things should be other than they are; for everything is right." -Candide by Voltaire

Clear Optimism

Being a firm believer in the perfect work and plan of our Lord Jesus Christ, I see Pangloss' quote as almost a challenge to place our hope and faith in God's sovereignty regardless of our surroundings. In the context of the story, Candide had pleaded with Pangloss for a "little wine and oil" twice. Pangloss then monologed about the "Probability" of the circumstances they found themselves in. Candide fainted and reality struck Pangloss.(Finally). The following day, Pangloss and Candide joined up with others who suvived the "disastrous circumstances" and shared a "mournful" meal. Assuringly Panglosss gave them the quote above. I don't know about you but if I had just gone through what these fellows had I would want to make Pangloss my meal or at least fire wood at this point just to shut him up! Why Didn't We Toss Him Overboard?
Does Pangloss have a point or is he stirring the pot and aggravating to those around him?