No, no my friend you are badly mistaken. Human nature has not changed. The reason they respected was simple. Think of 1970. Saudi's had just about exchanged their camels for cars. But they did not know how to drive them. Pakistan and Karachi for instance was the Dubai on the Arabian Sea. Camel Arabs sent their sons to Karachi for education. They had no schools, no universities and many lived in tents. Of course fo note I am talking about oily Arabs. The North African and Levant existed at another level and still do. I opened a thread some time ago about KSA before the oil. Do look.
https://defence.pk/pdf/threads/saudia-arabia-before-the-oil.470471/
Pakistan on the other hand looked like a sophisticated, relatively poweful country. Bhutto saw these camels but being smart knew they were drowning in new found wealth post the Arab oil embargo. He then used that opportunity by offering to teach them civilizaton. You know how to drive cars, how to fly planes, how eat in polite company. This is when Pakistan sent droves of experts to help run these oily countries. Many Arabs came to study in Karachi. Example is the ruling family of UAE who studied in Karachi and learn't to play cricket. The royal family of Jordan married a Pakistani from Karachi. Zia was a military advisor to Jordan and played crucial role in suppressing the PLO uprising against the king.
Princess Sarvath married Prince Hassan bin Talal of Jordan, in Karachi, Pakistan, on 28 August 1968. They live in one of the oldest houses in Amman and have four children:[1][8]
https://en.wikipedia.org/wiki/Princess_Sarvath_al-Hassan
Soon enough Pakistani pilots were flying their jets, Pakistani bankers running their banks, running their companies, training their armies. Fact was just because billions of dollars poured out of the sand they were just camel riders.
https://en.wikipedia.org/wiki/Agha_Hasan_Abedi
Then as we move forward by 1980s Pakistan was stagnating. A new generation of Arabs born with silver spoons in their mouths returned from vacations and universities in America and Europe. Increasingly Pakistani labour was buildng houses, roads etc for the camels. These generation looked at Pakistanis as poor, broken workers and "miskeen". Whereas as Americans and Europeans were gods. This brought on arrogance and frowning at Pakistan. By 1990s instead of looking up at us they looked down at us. And that is where we are today. We are taken for granted because we cheapen ourselves. Look in this very forum you have Saif al Arab. I am cool with him but I often end up having tiffles with him because of his haughty attitude toward Pakistan. He will go to incredible lengths to disassociate himself from Pakistanis as if Middle East as another continent in Europe.
In summary it never was about brotherhood. It was just convergence of interests. They needed us. We needed their $$$. But some of our people mistook that for mushy stuff like brotherhood or ummah. It never was. Keep that in mind. Now they depend on USA and Western Europe which is why all roads in KSA lead to Washington. Why would they bother with struggling Pakistan when they the only superpower is a phone call to White House?