There are tens of thousands of denominations of Christianity, with different beliefs on every single point of doctrine. However, some denominations like creationism have central tenets that are directly at odds with evolution.
1. If you believe the world is 6,000-10,000 years old, you must deny most of biology, chemistry, physics, geology, paleontology, archeology, and anthropology.
2. If you believe god made the first man and woman, you must deny evolution at the very least.
3. If you believe the world was entirely flooded 4,000 years ago, you must deny most of biology, chemistry, physics, geology, paleontology, archeology, and anthropology.
To put it in theological terms: If there was no Adam and Eve, then there was no original sin. If there was no original sin, then people don't necessarily need to be saved. If people don't all need to be saved, then there was no need for Jesus' sacrifice and resurrection. Evolution, which holds that humans are descended from populations of prior species and that there could never have been only two humans, completely undermines the entire theology of creationist sects. They can't let it go unchallenged, hence their empire of propaganda, misleading homeschool textbooks, apologetics channels, etc.