Now in general with regard to minorities, I think it is false to suggest that with just a little meddling from outside the ethnic minorities of Iran will rise against the central government. The Arab Iranians of khuzestan had a perfect opportunity to secede when Iraq attacked, and yet not only they did not so, they bravely stood against the invasion with empty hands and defended the cities of Abadan and Susangerd and dezful and Khorramshahr (until its fall) while the Iranian army had little resources to help there. That's not a population ready to secede and I am proud to see despite all the neglect from the central governments, the ties that connects all of us Iranians are still strong enough to maintain the country together.
Outside meddling will not work if an extreme level of dissatisfaction does not exist. If such dissatisfaction ever materialize among any ethnic groups that is part of the mosaic of Iranian nation, I somehow agree that any government of Iran must make a reasonable effort to maintain the unity of the country, primarily through addressing their concerns and also combating outside pressure and influence. However I believe that after everything, a land belongs to the people who live there and it remains their choice. I wish we were in a situation where not only Bahrain but also the people of Azerbaijan, Afghanistan and Turkmenistan were wishing to join back.