OK, so he is against sectarianism in Islam and says that the people who practice it are really helping the "enemy," meaning Israel and probably the US.
But minutes earlier, he tweeted this:
Many #Salafis & #Wahabis who are nourished by oil money & act as #terrorists, don't know they are enemy’s operatives.6/5/2009
— khamenei.ir (@khamenei_ir) January 6, 2014
No fostering schisms there!