You can't.
I answered: This type of stupidity doesn't help our cause.
You answered: Disprove my claim. You can't.
Surely, even you can't believe that.
Arabs are as completely human as you or I. It is their Muslim theology/ideology that is sub-human. It comes directly from the Devil and is therefore "not human".
The fact so many of these people are completely deluded and act on it does not denigrate their humanity. It only confirms it. Man's inate propensity for sin sees to it.