https://www.foxnews.com/opinion/iran-acting-tough-biden-message-james-jay-carafano
This is about Iran getting an even sweeter deal than they got from Obama.
Over the last four years, Tehran learned that threatening the U.S. only made their situation worse. The more Tehran postured, the more Washington doubled down on sanctions. When Iran directed the militias against U.S. forces in Iraq, the Americans hit back – hard. In Syria, Iran saw its position erode. Across the region with U.S.-backing, Arab nations normalized relations with Israel as a hedge against Iran. Tehran knows there is nothing to be gained by playing hardball with the Trump team.
However, Tehran’s provocations likely aren’t aimed at this administration so much as they are intended to intimidate the next one.