He called Him a Father!

Just because the terminology is lacking doesn't mean the theology or what exceeds it is so.
In fact, just because the terminology is present doesn't mean the theology stands as supposed.

A loving, nurturing Creator, sustaining & guiding -- this theology is present in Islam with or without the terminology of "Father"; and, being without comparison, is greater than all other expressions of mercy and compassion among the creation which it envelops.

With or without the terminology of "Father", Christianity still lacks this supposed theology of a necessary, just, and incomparably compassionate Lord of Mercy.

The terminology really has no bearing on the reality. It's a desperate distraction from discourse of the demonstrable truth. As Islam is true, your claim of a terminology is irrelevant.

Why can't you demonstrate that your claims of the Messiah using your theology, or even the terminology, to be true in reality? This is only made more apparent by your eagerness to avoid the dialogue, and the affirmation of the inescapable reality of the clear and cohesive theology of the Messiah, by a smokescreen of unclear attributions.