Al- Ka'ba in Makkah was the first house put by Allah (SWT) for all human beings (Aal Imran ; 96), that is why many prophets were born and lived in or near that area. It is also the place of the world gathering of Hajj. People come from all over the world to Makkah for Hajj and Umra. Prophets used to teach and guide them in every possible way.
The Arabian Peninsula is the central area of the whole world.
Wassalam
The burden of prophet hood is very heavy and Allah (SWT) who can carry it . Only 124000 prophets were among billions of human beings which means that most of people can not carry such heavy burden.
I understand after each punishment He tells us to be good, do good so we can achieve His mercy. But isn’t faith in Him based on pure love? If I fear His punishment at all times, how could my love be unconditional for Him? I understand if I don’t want to displease God, I have to avoid the bad things that He forbade, because that is for my own good. But why would I have to be always so afraid? In a book of love and mercy, it’s hard to see such punishments, because as for me, if I love God, I would aim to refrain from those things that may hurt me.