The question is why. If you said "God is great" in Arabic (or anglicised Arabic at least) for a good reason then sure, maybe a ban was unjustified. If you said it because you thought it was funny then you're mocking someone's culture.
I mean, to be fair to the guy, Lago, if someone said Deus Vult, would they be banned? Deus Vult literally means 'God Wills It'. A catholic may be offended by it.
