From a Saudi historian in his book : عنوان المجد " the address of glory" say that the sheikh was the one who prepares the troops, send companies and negotiate"
Hussein bin Ghanim one of Abdullwahhabs student quoting from abdulwahhabs messages on the page of 97 the book: تاريخ النجد "Najd history"
" The ruler of Aiyeenah, Othman bin mua'amr is kafir and mushrik, and then when all of the company knew about that, have taken the oath to kill him after Friday prayer, and so they did in Rajab 1163 of Hijra"
According to Islamic teaching the Muslim who revert "Kafir" or become a Mushrik "there's a different" have 3 days to repent. That ruler didn't get any chance.
Ibn Bashar "Student of Abdullwahhab" said on عنوان المجد on the events of 1187 of Hijra.
" and so marched Abdulaziz with his glorified troops to Riyadh, and fought them in days, destroyed towers and killed many of the city's men"
On page 88 he continues
"And the Muslims have invaded Tharmada for the 2nd time in same year, but a fight didn't happen for the residents didn't come outside to fight, so the Muslims destroyed these kuffars fields and took their livestock."
The Mufti of that time says in his book:
"He was ordered anyone who had pilgrimage to do it again for they being mushrikin before when they had done that, and anyone who wanted to be on the right path "the right Islam" should admit that he was a kafir, and his parent died on kufr and that scholar "the one abdulwahhab chooses" is kafir.
