That's assuming that all Christians think in lock-step uniformity about the issue of creationism or intelligent design.
As with just about every other religion, you can't even get Christians to agree on what it means to be "Christian". Hence the need for Southern Baptists, Presbyterians, Roman Catholics, Lutherans, Seventh Day Adventists, Pentecostals, United Church of Christ, etc.
If you leave out the LDS we agree on the specification, but not on the implementation.
Shalom.