Theology 101

I'm walking on Columbia Road toward the heart of Adams Morgan, the party place of this town.
It's almost 7:30 PM and it's already dark. I can see the two shadows of the men walking in front of me. I hear.
"So you see, GOD in reverse reads DOG, whereas Allah in reverse is still Allah". The other nods apparently in awe of the revelation.
They both start reciting loudly the Shahada, the fundamental statement of the Muslim faith:
"Ashhadu Alla Ilaha Illa Allah Wa Ashhadu Anna Muhammad Rasulu Allah"
They make no comment on the fact that the sentence backwards reads:
"Halla ulusar dammahaum anna udahhsa aw halla alli ahali alla udahhsa".