By Parisa Hafezi and Angus McDowallDUBAI, July 20 (Reuters) - Opposition to Iran's clerical rulers has long simmered in the country's impoverished south. But after bearing the brunt of U.S. strikes this month, many residents are directing their anger at President Donald Trump and an air campaign they say has upended their lives.

The conflict has been escalating since US President Donald Trump declared 10 days ago the peace deal with Iran is over.

Iran's supreme leader issued stern warnings after the United States conducted further strikes. Tehran announced it is suspending commitments to a recently signed interim deal. …