Islamic greeting is the best!?

in english we say goodmorning, if there is rain or fight in morning what should be good in morning, likewise there are greetings in other religions, but all are irrelevant to the situation and the cirstances. See how the islamic greeting is noble. Asalam-u-alikum (Peace be on you all) whenever its is said whether the person is in happy or sorrow in both cases the greeting has the relevance and is perfect in all respects.