Are Shiites kuffar?

[Al-Burcaawi]

I'm talking from their theology perspective.

whoever insults the mother of believers aisha ra and says that the quran is incomplete or incorrect is completely outside the fold of islam

 

[Aurelian]

whoever insults the mother of believers aisha ra and says that the quran is incomplete or incorrect is completely outside the fold of islam

Sure. Their view to Qur'an is the same to us, except for the tafsiir.
Check this https://en.wikipedia.org/wiki/Shia_view_of_the_Quran

Their view of A'isha stems from the battle of the camel.

When Yasir al-Habib, the Kuwaiti Shiite clergyman based in London, cursed A'isha, a number of Shiite scholars in al-Ahasa in Arabia inquired Ayatollah Khamenei's view about insulting and cursing the Prophet's wife. In response, Ayatollah Khamenei wrote, "It is forbidden to insult the symbols of our Sunni brothers, including the denunciation of the Prophet's wife [A'isha]. This includes the wives of all prophets (a) and in particular the head of prophets, our great prophet Muhammad (s)".