It's quite unfortunate, because modern Christianity in the last century or so has been hijacked by an anthropomorphized, creationist version of God that came out of fundamentalism and is really a caricature of the God described by classical theism and the more historic understanding of God in the Abrahamic traditions. God as these faiths have long understood him is not a super-human sky daddy. That is more akin to the gods of Greek mythology.
Regarding a close equivalent to Brahman without qualities, allow me to quote from from Vladimir Lossky's The Mystical Theology of the Eastern Church (pg. 25):
The Western Church, which had tended toward a more intellectualized, cataphatic theology, I think has often confused the painting with the object being painted. However, even in the West, theologians like Paul Tillich have emphasized that God is beyond all our categories and conceptualizations.
This is well said, Left Coast. In Hinduism, the concept described by the quote from Lossky is called the path of discrimination in jnana yoga, by which the devotee examines a "thing" (material, ideational, etc.) and declares, "Neti neti." That is, "not this, not this." After discarding all that is not, one arrives at Brahman, "iti iti." That is, "it is, It is!"