We don't call you people that way, if you want to insult someone you say it that way, and if Turks want to insult they would say something else to Iranians. When people are insulting each other it doesn't count as the culture of a country or the norm in the society.
Only 20% of Iranians are Azeris (US Library of Congress put that number at 16%, other independent sources in Russia and China agree with this number, CIA facebook says 24% which is a politically motivated number in my opinion), 50% is way too inaccurate.