One of the worst things you can ever do to Iranian is to call him or her Arab.
Iran has never been an Arabic country and until recent change in the name, it was known as Persia for thousands of years.
Iranian people have very strong ties to their history, culture and language, which are distinctively Persian; most of them do not speak or even want to speak Arabic.
They are very proud of their rich heritage, strongly admire their former kings especially Cyrus the Great called in Farsi “ shahenshah” which means King of Kings and his legacy of introducing human rights in a political setting of the longest existing empire in world’s history.
Another reason for which they dislike being mistakenly identified as Arabs is because Arab Islamic army conquered them in a very brutal way and forced them to change their religion, and customs by the edge of a sword.
It never fully succeeded and I believe that in near future we will see them reject Islam as being “Arab invention” and return to their former values of having just political leaders who will seek the very good of their country instead of their own interests and base lust for power as we can clearly observe it today.
So , please never insult any Iranian by assuming that they are Arabs just because they are from or living in the Middle East.
Quite frankly only the people in Saudi Arabia are truly Arab.
What you must realize is that WE ARE ALL EQUAL HUMANS BEINGS, however, languages, cultures, traditions, customs and sadly to say, yes even religions divide us.
In the case of Religions however, don't blame the Religion itself or even God, blame the ones who undermine the religion for their own personal gains. I'm Muslim, but I have nothing against Christians, Jewish People, Buddhists, Hindus, Sikhs or even Atheists, so long as the individual is not purposely causing harm unto innocent people.
Please do not make Islam look bad or any other religion for that matter... God did not intend for 'religions' to divide people, rather they were supposed to unite and strengthen people, provide social order and personal integrity.
I appreciate your opinion and I do not have anything at all personal against you... this is my point of view and you are allowed to disagree.
Peace and Blessings be upon you.