Let us make this thing perfectly clear.
The largest Pakistani diaspora in the world is based in KSA/GCC. Millions of Pakistanis and their entire families have direct people to people relations with Arabs. Including 10.000's of intermarriages. On this forum alone we have 3-4 half Arab half Pakistani users.
The average Pakistani shares much more in common with the average Arab (in particular GCC) than the average Turk/Anatolian (unless they are Turkish Arabs) be it genetically, geographically (Oman is next door), culturally, appearance wise, alphabet, linguistic influence etc. Arabic is the largest contributor of Urdu and you can find significant Arabic influences in every native language of Pakistan. There is the Islamic/Muslim element too with Arabs being the first to spread Islam to modern-day Pakistan and later mostly Arab Sufis spreading it.
The elites of Pakistan and the GCC (military) also have much closer ties.
More importantly the elites of the GCC and the Pakistani elite does not always represent the Arab or Pakistani people.
Things are not ideal because neither of the two elites are fully representing the will of the people. Arabs and Pakistanis are not enemies and never were and never will be.
Not long ago KSA was voted the best ally among Pakistanis in Pakistan. This was posted on PDF as well.
As for this Erdogan claim, have in mind that Erdogan (MB) is at odds with KSA/Egypt/UAE/Sudan/Syria/Iraq/Bahrain/Algeria/Morocco/most of the Arab world currently. Not more than 2-3 years ago, Erdogan was calling Arabs/KSA brothers 24/7.
But look at it from KSA's part. We have been the most reliant ally of Pakistan. Helped you immensely economically (with little gain in return), funded your nuclear program, KSA and UAE were the only countries (along with China) to support you after the sanctions after the nuclear bomb test, hosts the largest Pakistani diaspora in the world (while KSA could easily have employed fellow Arabs, we don't lack Arabs, there are 550 million of us and quickly growing, let alone 1.7 billion Muslims to take from) etc.
To talk about Muslim unity while trying to undermine the OIC (where every Muslim country is a member) from 3 countries (Turkey where prostitution is legal, gay parades occur in public, large domestic alcohol/beer industry, recognized Israel, NATO (crusader alliance in most Muslims eyes at least on PDF), member, Qatar (no difference to KSA other than hosting the largest US base in the region, so much for being anti-West) and Malaysia (very pro-India with a lot of Indians) etc. Just because of some empty words about Kashmir that Pakistan (sorry to say it but Kashmir has been abandoned by the Pakistani state much like the Arab regimes have abandoned Palestine today) has failed at too.
KSA has a larger economy than Turkey but Turkey is not a small economy (20th largest in the world) as well but if KSA is such a demon, why does Turkey not host 4 million Pakistanis and help bail out Pakistan every single time like KSA has been doing? Where was Turkey during your most tested times?
All this after Pakistan decline to send a symbolic number of experienced mountain troops to Yemen that would be stationed across the almost 4000 meter tall Saudi Arabian-Yemeni border?
So not only should KSA be doing all that, it should look helplessly while the OIC is destroyed by people who claim to profess "Muslim unity". People cannot see the irony, I am afraid.
BTW this entire news is nonsense.
King Salman spoke with Mahathir and told him that there is already the OIC (every Muslim majority state is a member) where everyone can put forward every issue in the Muslim world and that there is no need to create more division in the Muslim world by creating organizations that will never be effective. You cannot talk about unity in such a fashion.
Not only that, I can only speak for Arabs, but most Arabs do not look favorably at Iranian foreign policy/meddling in the Arab world (only in weak Arab states that are at conflict, if anyone doubt the authenticity of that claim take a look at the massive anti-Iran protests among Iraqi Shia Arabs and Shia Arab Lebanese that have been ongoing for months) nor for that matter the Turkish meddling. Most Arabs do not subscribe to the MB model that Qatar is actively propagandizing along with Erdogan either. Egyptians are not content when wanted terrorists are broadcasting hatred while based in Turkey and Qatar and urging Egyptians to commit terrorist attacks against the Egyptian Arab Army which is respected by all Egyptians.