Religion's main problem with evolution, I've found, is that religious people don't like the logical consequences of it being true. ie. If we assume every human being has a completely arbitrarily assigned "soul" then it asks the religious person to make some very hard logical leaps when looking back at evolution. The difference between humans and other primates are varying ranges of small to tiny, so do they have souls too? But the difference between primates and the other relatives of that group are small, so do they all have souls too? What about another step back from that? Every step is small and it's impossible to make a serious clear line saying "This side has souls, that side does not" without being completely arbitrary in the most blatantly obvious of ways. At some point, the logical extension of souls + evolution leads you to have to wonder about the spiritual salvation of your potted plants. If you simply decide "no, only humans!" the question then arises, at what point did humans suddenly go from soulless beasts to salvation-necessary god worshipers? Evolution basically makes it so that religion has to fall onto one of two conclusions: Either we have not always had souls, in which case souls are a recent "invention", which religion cannot accept because it challenges the timelessness of their tenents, OR all living things have souls, in which case not only are they committing murder every time you kill literally anything, be it animals for your meat, wheat for your bread, or sugar cane for your cereal, but they have to concern themselves over the question of how soul-bound non-humans fit into their belief in the afterlife, ie do monkeys go to heaven, do dogs go to heaven, do cats go to heaven, do gerbils go to heaven, do worms go to heaven, do potted plants go to heaven? What does the spiritual salvation of a potted plant hinge on? Is it possible for anything other than a human to go to hell? Based on what do they make a claim one way or the other? And so on and so on. In the end, because evolution brings up so many uncomfortable questions, religions have a tendency to fall back on to their creation stories and simply claim evolution is a lie because it doesn't mesh with that story.