If the bus had said “there is no Allah (probably)” ..... that was the point this guy was getting at.
Anyway I think many Christian messages are something like “I think Jesus is (probably) God” Our witness is often very weak (myself sadly included)
What Atheist, agnostics and ignorant people in general do not grasp, either because they won't investigate, or rather they want to stay willfully blinded too, is Christian's have a written account of testimony which undeniable states, JESUS IS GOD. All evidence points to the accuracy of the statement and there is not one single shred of credible evidence contradicting it's validity! In fact if you really study the bible, there's more evidence in between the words and letters than one could ever hope to collect in support of this reality.