Is being Christian/Wiccan a contradiction?

For what it is worth, here is an excerpt from an article that addresses this question. If you are deeply interested I recommend the reading of the entire article.

The problem I see with trying to incorporate the two practices is the enormous human effort required to examine Wicca VS Christianity without opening the door to the many secret, Gnostic schools of belief and other religions and thus complicating the issue at hand.

ADDENDUM: 01/02/07:
Despite the assertion below, I do not think you can wholeheartedly serve two masters or practice two religions that have distinct differences despite some philosphical similarities.

The excerpt:
Christian Wicca: The Oxymoron Syndrome
Frequently Asked Questions
How Can Christianity and Wicca Mix? How can that be? Isn't being a Christian and a Wiccan oxymoron? The term Wiccan does not automatically indicate “anti-Christian” – this is the single most misunderstood concept revolving around Christian Wicca. This is a stereotypical way of thinking and a spiritual prejudice. As the researcher and author, obviously I have been able to draw the parallels of communing with the Holy Trinity within the spiritual framework of Wicca. However, the numbers of people who have claimed to study both Christianity and Wicca, and have not seen the parallels have overwhelmed me.
To be very honest, I am not the original person to set about Christianizing the practices and sacred Days of Power of The Wicca, Pagan religions, or any earth-based religions. As much as I would like to take credit for this - the Roman Catholic Church did this first. The Catholics are truly in many aspects the original Christian Wiccans or ChristoPagans!
Understandingly, it is human nature for us to not see the obvious truths standing directly before us. The change that the truth brings about in one's own life is a scary thing. It is much simpler to be spiritually ignorant to esoteric concepts rather than to complicate one's mind and soul with unfamiliar ideologies. The modern Church tends to frown upon anything outside beyond the mundane.
Most people don't consider the many sects and denominations of Christianity as being oxymoronic, they are merely a different approaches. For example, when a Christian worships as Baptist is that an oxymoron? No, of course it is not! When a Christian worships as a Catholic or a Protestant, we don't consider this an oxymoron, we considered this a diversity of theory and practice within the umbrella of Christianity.
Likewise, Wiccans identify themselves by tradition. Some of the traditions include Dianic Wiccans, Gardnerian Wiccans, Faerie Wiccans, Celtic Wiccans, and Eclectic Wiccans. What is wrong with considering Christian to be another tradition of Wicca?
Spiritual labels such as Dianic, Baptist, Eclectic and Catholic only define the technique of worship the practitioner uses to commune with the Divine. This concept is the same as when a Christian worships as a Wiccan. If it helps you to think of Wicca as another denomination of Christianity in order to better understand this spiritual path for yourself or to explain to others, then by all means, feel free to present it in such a light.
So, what aspects make Christian Wicca not an oxymoron? Below, I have tried to list the most frequently asked questions and address the most commonly distorted concepts revolving around practicing Christianity in the framework of Wicca.

http://www.christianwicca.org/oxymoron.html