The beliefs of the Shi'a are clear kufr - there is no doubt about this. Any ulama that have dealt with the issue of the ithna-'Ashariyah Shi'a have come to the conclusion that beliefs of the ithna-'Ashariyah remove them from Islam. My brother will never call, let alone believe, that my mother a prostitute. My brother will never say, let alone believe, that my mother is in the hellfire. My brother will never say, let alone believe, that my mother's father is a heinous criminal. My brother will never say, let alone believe, that the beloved friends of my Prophet were kuffar, criminals, sodomites. All these things have been said by the Shi'a and are found not just in their books, but in this age of information, video and audio evidence is available in record amount. The guy I mentioned earlier, Yasser al-Habeeb from Kuwait, is a filthy Shi'a who said that they don't have to practice their taqiyya anymore since they have sufficient power and should now reveal their true beliefs. In doing so, he has held conferences dishonouring my mother and your mother, he and his followers routinely insult those who were the most beloved of Allah and his Rasool . The majority of lay Shi'a don't know such things and thus I don't say anything bad about them nor do I hate them. But as soon as someone wags his tongue by attacking our mothers and those who were the close friends and brothers of Rasoolullah - then I hate him and will never stop hating him until he repents from his remarks. If someone says ignorant things about me, I won't care. He can insult me all they want but I would not stop calling this person my brother if he was a Muslim. But, as soon as he insults our mothers and the sahaba , he has forfeited his Islam and is not my brother anymore. Also, why are you bringing the Saudis into this? None of their actions can be used to say that they are Kaafir. They could even destroy and rebuild the Ka'aba and they would still not be considered kaafir. Also, they never desecrated the graves by destroying the tombs built upon them. Even if you don't agree with them, you should know that there have been many ulama who have said that graves should not have anything built upon them. So, these are matters of fiqh and matters upon which there is a difference of opinion. If a Wahhabi says that you can hold the Qur'an in a state of impurity and that he does so often, I would say he is wrong and tell others not to listen to him - but I won't call him a kaafir. But, if he curses our mothers, he has forfeited his religion. If a Zaydi says that 'Ali was the rightful first khalifa, I would say he is wrong and warn others not to listen to him - but I won't call him a kaafir. But, if he curses Abu Bakr and Umar رضي الله عنهما and calls them kaafir, then he has forfeited his religion. If a khaariji says that 'Ali was wrong, I would say he is wrong and warn others not to listen to him - but I won't call him a kaafir. But, if he curses 'Ali and calls him a kaafir, then he has forfeited his religion.