Sorry, you would be angry too if KSA or any other Arab country had been attacking your country directly in recent days or for the past 47 years helped create disunity, division, terrorist cult proxies etc. Iran has been a huge cause for disunity, division, opportunistic meddling, holding the region down etc. I am not even going to mention events in Yemen, Syria, Iraq, Lebanon etc.
Feelings and emotions are high. Many Arabs are sick and tired of the Iranian regime and their actions in the region. I am one of them.
We never had a problem with ordinary non-hostile Iranians regardless of their ethnic origin - whether Persian, Arab, Azeri, Baloch, Kurd, Turkmen, Lur, Afro-Iranains and the many other ethnic groups that call Iran their home.
Do not forget that GCC is hosting the largest regional Iranian diaspora. Or that there are deep and long-lasting (several millennia old) ties between Arabs of Eastern Arabia and Iraq next door and Southern Iranians in particular (homeland of Persians - Fars province). Millions of Arabs from our part of the world and Iranians have ancestry from both regions and groups of people.
My problem was always the Iranian regime policies and actions of it and anti-Arab and anti-Muslim Iranians who display hatred towards us. Otherwise I have no problem with any Iranian, whether Shia, Sunni, Atheist, Agnostic, nationalist, communists, liberal, secular, you name it.
BTW, there is no such thing as "Persian Gulf countries" anymore than Iran being a "Gulf of Oman" and "Arabian Sea" country. The countries that you are talking about are Arab countries of Eastern Arabia located on the Arabian Peninsula. KSA is not a "Khaliji" country either. We are 1.5 times the size of Iran and only a very small overall portion of our country is located in Eastern Arabia let alone speaks any Khaliji Arabic dialect.
en.wikipedia.org
en.wikipedia.org
Less than 1 million locals speak a Khaliji Arabic dialect (a dialect (s) also spoken in Southern coastal Iran btw).
Persian Gulf is a (before it was known as the Gulf of Dilmun, Sumer etc.) body of water that we share and whose longest coastline is composed of Arab countries. Even many Arabs in Iran live along this body of water. I do not understand the obsession about some Iranians to impose on us some ridiculous notion of "Persian Gulf countries". I look at this as a provocation similar to how Iranians would look at it, if we called you an "Arabian Sea country" or "Gulf of Oman country".
If you ask me this entire "Gulf" terminology must die. In particular those of us from KSA - in my case Hejaz which is closer to Cyprus, southeastern Turkiye (Hatay etc.), Jordan/Palestine/Israel/Syria (Southern Levant) next door, Egypt, Yemen etc.
This terminology (Khaliji Arabs) should be used exclusively for people from Southern Iraq, Kuwait, coastal Eastern province of KSA, UAE, Bahrain and northern Oman. Nobody else, really.
Anyway lastly you know that millions of Iranians are cheering for the downfall of the Iranian regime - yourself included. I have posted some videos from Iran where locals are cheering and cursing the regime while the country is getting bombed (regime targets mostly).
BTW, I do apologize if some of my posts have been inflammatory but they are aimed at the Iranian regime and also fueled by numerous trolls who are insulting Arabs out of nowhere even though Arabs, other than some claims of Qatar attacking Iran directly (who can blame them when they were attacked) as well as shooting down 2 Iranian Su-24 fighter jets, are not attacking Iran. In fact leadership constantly called for a stop to this war but it was the US and Israeli decision. Not our, yet we are blame for this.
Any way we will need many years, a new regime and much more people to people relations for this mistrust and at times dislike to end. I am sure it will because if you look at history, throughout most of it, Arabs and Iranians have lived peacefully next to each other.