system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What is happening in Iran?

From the storming of the British embassy to allegedly shooting down a US drone. Why is it happening?
gpt
The West and Iran have a long history of hatred that goes back many years.  It goes back to the early 50's.  The CIA financed a revolution in Iran and appointed a king (the Shah) to lead the country.  He wasnt very well liked and was overthrown in 1979.  The Shah fled to America, when the US wouldn't return him for trial, Iran took the American embassy hostage for a year, this pissed off America so bad that they effectived green-lit a war against Iran; the Iran-Iraq war.  This war was bad, very bad for Iran.  Iran won, but at a huge cost of nearly of up to a million dead (the Iraqis used chemical warfare on a regular basis).  Additionally, at one point an American boat shot down a civilian airliner.  The Iranians obviously weren't happy and almost certainly helped set up a large attack on the American embassy in Beirut (by Hezbollah, who they created).  Pretty much since then, they have been fighting indirectly in all sorts of ways.  For example, its very likely that America (and probably Israel) have been the ones responsible for the deaths of several Iranian scientists, and its also likely that Iran has helped set up attacks on U.S. soldiers in Iraq.