Wrong! When a Christian shouts, "Hail, Christ the King!" he is speaking a word of praise to God. It is between the devotee and God alone.
When a Muslim shouts, "Allahu Akbar!" he is issuing a challenge. The phrase means "my god is greater [than your god]!" At this, the hearer should be prepared for mayhem because the Muslim is about to try to prove his god's strength by violently overcoming you and your God.
Does the word antithetical mean anything to you.