Hes mad at me because dad (my now dead character) made me heir and not him, apperently after my war with the Magyars, my popularity fell so low that now he holds 120% (!!!) of the kingdom's levies (vassal army). So he asks him to give him the crown, i say no and he starts a civil war. He takes control of 1/4 of my country and 1/4 is still loyal to me, several weeks later (minutes) 2 of my dukes decide to join him so now 3/4 of my territories are lost and he has 300% more army than me, i cant ask any of the other kings for help, nor do i have the money to get mercenaries...
Idolatry is bad, Ivan!