Assalamu alaykum,
First of all, I ask that you do not be angry and be careful with what you write.
As for the Shi'ah, perhaps you are unaware of their major core beliefs? when someone worships other than Allaah, and rejects the teachings of the Prophet Muhammad
they are not Muslim. Just because they claim to believe in Allaah and the Prophet Muhammad
does not mean they are right.
The Shia, do not have same beliefs as us. First of all, they reject most of the Companions of the Prophet
and make lies about them. Even, they say many bad things about one of the greatest Muslim women of Islam, A'isha, Umm al mu'mineen, the mothers of the believers. They accuse her of very bad things.
They pray to other than Allaah, they supplicate to their dead Imams, they reject the sayings of the Prophet Muhammad
. They believe in Temporary marriage, where according to them a woman can be married for just a few minutes or an hour or whatever the man wants... This is all forbidden by the Prophet Muhammad
why does this not anger you?
Many people claim to be Muslims, for example the Ahmadiyyah, Ismailiyyah, and so forth. THey are not considered even "Sects" of Islam. Because, they are outside of Islam.
The Major scholars of Islam, from Imam Abu Hanifa, to Ibn Taymiyyah, to the ulema' of today have said that the Raafidah (the Shia), are not Muslim. Even the Imams of Makkah and Madinah believe this. So, obviously, we do not call the Shi'aa disbelievers and wrong for no reason.
We should not care if those who are enemies to Islaam find it offensive. Because, we take pride and value our Deen, our beautiful and perfect Islaam. We defend it from all those who are against the true teachings.
We can not say that an individual person, is a disbeliever, unless of course, we are completely sure they believe in all the beliefs that are taught by the shia.
I know that, we would love everyone to work together and to obey the Qur'aan and Hadith, but you have people, who because of their beliefs are enemies of Islam.