This question highlights a core philosophical divide between Christian and Islamic theology.
In mainstream Christianity, God's omnipotence means He has the power to manifest Himself in the material world, and the Incarnation: God taking on human flesh in the person of Jesus is viewed as the ultimate expression of His love and willingness to humble Himself for human salvation. In Islamic theology, this concept is rejected as an absolute logical contradiction; Islam teaches that God's nature is completely perfect, unchangeable (immutable), and transcendent, meaning the infinite, eternal Creator cannot simultaneously possess the weak, limited, and mortal attributes of a human being.