Asalam o Alaikum,
I had recently asked you a question regarding the ruling on a person who reads salah without wudhu. You said he would be a big sinner and the action would be considered kufr if he denied wudhu being mandatory for salah. A few days after reading your answer I had to attend the janaza of a relative and I realized that I may have been offering janaza prayers without wudhu in the past. In many cases the janaza prayer is held after a congregation prayer in masjid. In those cases I am sure I must have been with wudhu but there have been other cases where the prayer was held in a park or some open field without any immediately nearby facility for wudhu. I do not remember my state in those conditions but I feel I may have been without wudhu thinking mistakenly that perhaps wudhu is not required for janaza. I may have mistakenly formed this opinion by observing other people around me who are with shoes and have no signs of wudhu as you usually have with other congregation payers. It also may have occurred to me that perhaps it is allowed to pray janaza without wudhu because of difficulty of performing it in a war like situation. Since I dont attend janaza very often, it probably didnt occur to me to check my assumption.
1) Does this situation, where a person mistakenly assumes something to be not mandatory, when it actually is take a person out of the fold of Islam ?
2) I do not remember if I actually held opinion to pray janaza without wudhu to be permissible mistakenly or I was heedless or careless in not doing wudhu.
3) Although i have corrected my belief and made tauba, do i have to repeat nikaah?