Apparently, the Saudi King does not feel the same way about bowing.
Also, I don’t believe he bowed to the leader of Indonesia and that is a Muslim country as well - the very country he lived in as a child.
I don’t believe any other leader bowed to the Saudi King, especially in a setting where they are all equals. He should have said ‘As-Salaam-Alaikum’ and shook his hand if he wanted to relate to him.
True, 0 didn’t bow to the man from Indonesia. However, the Saudi king is the political ruler of the holy sites of Islam.