And that horse would probably enter jannah because of that. :) Its the rider who will rot on the other side forever for the crimes he committed.
BTW, Codey Mian, theres a trend among "muslims" now a days. They have added "radi-Allahu ta'ala 'anh" to yazid's name. And you say shia insult/degrade sahaba?
Large majority of Sunnis are very khush aqeeda and love the Prophet and his Ahlul Bayt. Trouble is that large number of Wahabi inspired individuals, under the disguise of Ahlay Sunna, have infiltrated them and have tried to corrupt their idealogy (they have been very successful at it too, thanks to the family of Saud and their petro dollars). Same people who kill Shias and consider them Kaafir have killed Sunnis intellects like Maulana Murtaza Malik, Dr Hakeem Saeed, and Professor Attaur Rahman.
These are the people who use the term Radi Allah for the individuals such as Yazeed and his father.