I am a Sunni Muslim, I am very confused regarding the issue of yazeed!, was he a Muslim or a kaafir?
Can I have evidence aswell please?
السلام عليكم ورحمة الله وبركاته
1) As a Muslim, you are not required to have ANY opinion on anyone not mentioned in the Qur'an and Sunnah. Why do we, as Muslims, believe Luqman is going to heaven? Because it says it in the Qur'an. Why do we believe that Abu Lahab is going to hell? Because it says it in the Qur'an. As a Sunni, you should know there are narrations that testify that certain people are going to heaven (Khadijah, 10 Promised Paradise, the Ansaar, al-Hassan and al-Husayn for example) and certain people are going to hell (ibn Ubay al-Salool for example).
2) As far as Yazid is concerened, then know he is not a Companion nor is he considered from the Tabi3een. Rather, he was a ruler who ruled when there were quite a few who were better than him (al-Husayn, ibn Omar etc) and history has not recorded his reign as being good; neither morally nor secularly. Also, his actions led (if he didn't downright order) to the death of al-Husayn رضي الله عنه and other great Companions and Tabi3een.
3) Most of our scholars have said the right thing to do is to keep quite about him and neither curse him nor praise him and leave his affair to Allah. This is what we do with everyone, whether we perceive them as good or bad. Imam Ahmad ibn Hanbal رحمه الله says:
لا نشهد لأحد بجنة ولا نار.
We don't testify to anyone that they are going to heaven or hell.
والله تعالى أعلم