Will crashing oil prices make Russia, Iran and Venezuela more dangerous?

Will crashing oil prices make Russia, Iran and Venezuela more dangerous? « Watchdog.org:
"The plummeting price of oil is giving the economies of Russia, Iran and Venezuela a strong smack upside the head.

And while the resulting crises before Russia President Vladimir Putin, the ruling clerics in Iran and the successor to Hugo Chavez in Venezuela won’t engender much sympathy from many corners of the world, what those leaders may do in response has a number of foreign policy analysts worried.
“With the oil situation, things can go in a lot of different ways,” Stephen Szabo, executive director of the Transatlantic Academy, told Watchdog.org.
“The leadership in these countries is not exactly responsive to their people and they could lash out.”