When it comes to evolution we have no need to ‘believe in’ it. We either do or do not accept it as an important part of the process for all life on earth. Some of the vilest people on earth accept evolution and embrace the idea that the survival of the fittest is a good moral code to adopt.
Whether or not we accept evolution at a mental level, at a molecular level we are all part of the evolutionary process anyway; whereas, the gift of eternal life is not on offer to those who merely accept the existence of a god of their choice. Faith and action are required. Faith without works is dead according to the zealous Paul.
To be a believer requires trying to help those who lack faith in their god to gain salvation and living by a set moral code. That is according to the bible which many Christians now dismiss as folklore. Muslims continue to believe the Koran to be inspired and holy.
It is possible to accept evolution but remain free to hold whatever cherished beliefs we wish to. Some Christians manage this amazing conjuring trick, which impresses me greatly.