A revealing article by James Brazier on why Iran hates the Taliban:
There has been no Western outcry against Saudi Arabia’s mediation between the Taliban and the Afghan government. On the contrary, the Mecca talks were accompanied by senior British and U.S. officials indicating that such discussions were an evitable part of ending the war in Afghanistan. Only one country has denounced the meeting as an unacceptable capitulation to terrorism and extremism: Iran. This position reflects the untold story of Iran’s tussle with Saudi Arabia for regional influence.
The Dish 