pm if any christain told you that they dont believe in jesus as partner of God then they are confused christians they have no idea of their religon.

there religion taught them to believe that jesus( A.S) can save them, can answer there prayer, can sustain their needs, can protect them! as a muslim do you believe that? this kind of characteristic is only certain with GOD alone not to any one, nor his prophet or angels.
with this kind of mindset automatically qualify to be polythies or assigning partners with GOD in authority in which it is only unique to him.

"Born optimist nothing can keep me too low for so long"