The fact is that Iran is disliked by all Arab countries and most Sunni Arabs and Muslims. Simple as that. For obvious reasons.
It comes from racism which can be seen in your history too , You always called Persians Ajam , Dirty , slave and ... and your Caliphs always humiliated Persians after conquering Iran with the way came from your brutality , racism and incivility which can't be found neither in Islam nor in prophet's life .
Nowadays , all you see in the Arabian states around Persian Gulf ( not in all Sunni countries ) is same racism , ideology and avarice which you have inherited from your ancestors .
And Iran is a puppet of Russia and China who are more anti-Muslim than the US .
As far as I know , Iran is neither pro Russia nor pro China , There is a common thing among these 3 countries which has made them to be in 1 side and leave the differences aside which is being Anti US and NATO .
As far as I see in my country its a hate towards Russia as they've always betrayed us in the history ad every single person knows that China supporting us for it's benefits such as same politics against west and the resources Iran selling them with lower price not for God's or Iranian people's sake .
killing our brothers and sisters in Syria
I'm kinda dying for the Saudi Arabian humanity and pity .
Can't stop , tears rolling
KSA is the biggest receiver of Muslim immigrants of any country in the world.
As long as the history shows , KSA is the heaven of the dictators and Wahhabi Suicide Bombers that wanna blow themselves among shias to reach heaven .