That is a manufactured history fed to Azerbaijanis by state to bolster their national identity. The truth is that Azerbaijan was a province of Iran for atleast 2500 years if not more. Open up any non-state issued history book and read it. Iran just like any other big nation with a great empire history is composed of many different ethnicity and it natural for rulers to come from them. No surprises there. Iranians accept this. As for rejoining the motherland again open up any respectable history book and see for yourself that during the history of Iran many such small lands like Azerbaijan seceded partially from Iran only to rejoin again. Nations with great histories are like that. Azerbaijan did not existed as a COUNTRY ever before 1990. Another factual history. So a state built on just 21 years of history is not really in a position to project massive power specially that during its entire history it has been ruled by a single king. It is a country with a single king history. There are more Turkic dialect speaking people in Iran than in Azerbaijan and also lets not forget that Iran's most powerful man is also one of them and interestingly he sees Azerbaijan as a anti-Islamic state whose people should be helped to free themselves from their dictatorship. When was the last time there was an election in Azerbaijan? What happens to the guy who stand up against the president cum king in an imaginary election? Is he going to be boiled and skinned? I thought so. That means brutal dictatorship.
Many wrong points.
1: 2500 years has no relation to modern Azerbaijan, modern Azerbaijani nation are descendets of Seljuqs. So we are in fact conquerors of Iran in a sense.
2: In what way? Iran did not exists as a state in modern terms before 1925, that is when Pahlavid came to power. First Azerbaijan Republic was created in 1918, not 1990. Also, there was state called Atabegs of Azerbaijan in 1135-1225 that ruled large parts of Iran aswell. And altough a state in modern sense did not exist, Azeris are direct descendets of Seljuqs, Ilkhanate, Kara-Koyunlu and Safavids. Our ancestors ruled Iran for centuries, not vice-versa.
Azerbaijan are not democratic, but surely it is much more democratic than Iran when it really comes to it. No one dies in Azerbaijan because they want to shout slogans. Can you even write something against Iranian regime in Iran? A guy just because forgot to write "Salam" to Ahmedinejad in his letters were thrown to jail.