The US didn't overthrow the democratically elected Iranian government because of Shia rebels. Iraq didn't invade iran because of Shia rebels. ISIS didn't attack Iran because of Shia rebels. Remember the major force that defeated ISIS in Iraq was the Shia militias maintaining the authority of the Iraq government. The view from Iran is that they are under threat from the US, Israel, the Arab (Sunni) states. That the Shia populations across the middle east are widely oppressed and dependant on iran for their protection. Hamas is NOT a Shia militia. Iran does not exist in a stable part of the world it's neighbours are Armenia, Azerbaijan, Turkmenistan, Pakistan, Afghanistan, Iraq, and Turkey and maritime neighbours are Kuwait, Saudi Arabia, Bahrain, Qatar, the United Arab Emirates, and Oman. Caspian sea neighbours are Russia and Kazakhstan. majority Shia population countries are Iran, Iraq, Bahrain, Azerbaijan and Lebanon. many have historically been ruled by a Sunni minority.