We lost OUR colonies to Britain. Arabs were never a real part of this nation, if they were, this wouldn't happen:
en.wikipedia.org
So they picked British colonialism over Ottoman rule, and we chose independence.
en.wikipedia.org
Yes, it was really bloody and we lost a lot of good people but thanks to their sacrifice, we never got colonized.
Arabs could fight alongside us but they chose to fight against us. Which is why we should NEVER shed a single drop of Turkish blood to help them.
They chose their own fate.