Yes, but it is not based on religion.  No one claims that the Quran says that Sunnis or Shias should be killed, and the Prophet never uttered such nonsense either.  This "battle" is based on politics and power alone, which are the same themes of every other conflict that has occurred in the name of religion in history.

When the IRA was blowing up bombs in the UK during the 80's, did anyone say that it was a Catholic/Protestant issue?  No, it was political, just like this.