Iranian people are fed up with the Mullah. He has made their lives so miserable, no jobs, no food, drugs, low living standard..etc.
The common man, wants to put bread on the table, feed his family first, have access to good healthcare, and education. When his taxes are being wasted overseas, resentment will rise.
This happening in Mashhad, is no small feat by the way. Mashhad is one the biggest centers of shiaism, and discontent here, says a lot.