DD, Your observation is right, .....
His observation can be applied to anyone in the world. This is why it does not make Khomeini similar to khawarij.
Khwarij was a group that called other people kafir and allowed their killings and raping because of that. Khomeini did not do that. Actually, no one else in Islam went to these extremes except Taliban and their Wahhabi teachers. This is why Taliban=Khawarij.