when it is said to them believe in that which allah has sent down they say we believe only in that which has been sent to us and reject everything else though it is the truth and confirms what is with them. well ask them if you sincerely believed in what was sent down to you why did you kill the messengers of allah ?
وإذا قيل لهم آمنوا بما أنزل الله قالوا نؤمن بما أنزل علينا ويكفرون بما وراءه وهو الحق مصدقا لما معهم قل فلم تقتلون أنبياء الله من قبل إن كنتم مؤمنين