If Allah is in every direction why Muslims face only Mecca?

The first thing that needs to cleared is that Muslims believe that Allah is above the heavens and His knowledge is everywhere.
The writer has written the following in this topic:

If this is true, why do the Mohammedans turn their face towards Qibla (i.e., the
sacred Mosque at Mecca)?

For the meaning of Qibla, he writes the sacred mosque at Mecca. If he had translated it correctly, there would have been no problem at all. The meaning of Qibla is direction and Muslims face in that direction for the purposes of unity. From this argument, it appears that this book by the writer is only for non-Muslims as the allegations are very childish. The purpose was either to serve as a block for those Hindus interested in Islam or to make money from it or to have fame or all of them.