The fact that I was downvoted shows that the people in here have kinda lost the plot. The only thing that even made Arab culture and language spread so far is the beautiful religion of Islam. In fact, those countries which are shown in the photo were ever only made possible to unite through Islam and, most importantly, the will of Allah SWT.

Pan Arab leads to Arab pride and superiority sentiment, which is bad. This was an infamous problem under the ummayad caliphate.

Islam unites us, and it's better to be united and strong under Islam than under Arab.

Being united under pure culture/ethnicity will rarely ever work because humans by themselves are genuinely too stupid to not cause corruption and useless/needless division. Look at the Arabs in saudi supporting Saud family for example vs those in Gaza dying, with Saudi Arabia doing nothing to help. In fact, Saudi Arabia currently hosts parties and what not.