In summary: the disbelief of the Jews is rooted in their failure to act upon the knowledge they possess—they know the truth yet do not follow it in practice, or at times neither in word nor in deed. (1) The disbelief of the Christians, by contrast, stems from acting without knowledge: they exert themselves in various forms of worship without any law from Allah, and they speak about Allah without knowledge.
For this reason (2) the early generations (3)—Sufyān ibn ʿUyaynah (4) and others—used to say: (5) “Whoever among our scholars becomes corrupt bears a resemblance to the Jews, and whoever among our devotees becomes corrupt bears a resemblance to the Christians.” This is not the place to elaborate on that.
And even though (6) Allah has warned us against their path, His decree is inexorably fulfilled in accordance with what His Messenger foretold, something already encompassed in His prior knowledge. Thus, in the report recorded by al-Bukhārī and Muslim—on the authority of Abū Saʿīd al-Khudrī (7), may Allah be pleased with him—the Messenger of Allah (peace and blessings be upon him) said: “You will surely follow the ways of those who … (8)”