Islam is very diverse and complicated. I have discovered that some Muslims do not believe that it is important that everyone eats a sacrifice and that it is finished. In my community this is very important to give everyone some and to finish it because of hadith which says so. So there is no universal other than that Allah is the only god Muhammed is the messenger and the Qur'an is the word of Allah.
Islam is very diverse and complicated. I have discovered that some Muslims do not believe that it is important that everyone eats a sacrifice and that it is finished. In my community this is very important to give everyone some and to finish it because of hadith which says so. So there is no universal other than that Allah is the only god Muhammed is the messenger and the Qur'an is the word of Allah.