^ I am afraid you have fallen prey to mischievious propaganda o the point that you have stopped using common sense.
may be u r rite. as human knowlege is limited and has many limitation.
but my point is if the imams of hadith (imam bukhari and imam muslim) we follow has not mention nething negative about hazrat yazid and majority of sahaba endorsed his caliphship. we have got no point to condemn him as a pervert.