How was Jesus a Muslim if he came before Islam?

Sources: Qur'an 3:52, 5:111, 2:131, 10:72, 2:133, 10:84, 27:44, 19:1, 19:16-31, 3:49-51, 5:48, 42:13, 3:84, 4:171, 3:199, 37:181; Sahih al-Bukhari 3443, 3535, 3877, 1245; Musnad Ahmad 1740 (Umm Salama's report, hasan). Researched with Qaf.
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