The theory of evolution has been proven by scientists over and over again (a theory from a committed Christian, Darwin)
Okay - let's move out of religion for a moment to things based on fact...
Maths is a discipline where every concept is only accepted when shown based on earlier proofs - i.e. unless incontrovertibly proven it is assumed to be wrong
Science is a discipline of hypothesis - assumed to be correct unless proven otherwise... a flawed concept in itself it is the human way of dealing with so much we don't understand... but year on year we disprove what was believed scientifically in previous years...
Let us return to Darwin and his theory of evolution - a hypothesis, not fact - a theory.
We also need to understand the wording used - to evolve is different from a concept of Evolution (verb versus proper noun) - there is absolute clarity that stuff evolves - adapting if you like to environment, whether that is as people around the world, or as moths on tree bark, clearly evolution - the verb takes place, and that is totally in accordance with God's planned world and the Scriptures...
However equally there is total clarity that there has never been Evolution - move from one species to another, so until a scientist actually proves a change of species Darwin's theory of Evolution will remain just that - a theory, unproven.
If this were maths - everyone would therefore dismiss it until proven - because it is science it is assumed correct until disproved - however, while there is a lot of clever wording, there is no actual scientific proof that any one species changed to become another... if it weren't for the gravitas bestowed upon the concept it would be laughable - that a fish might become a human - no chance!
So, why do people want this theory to be right - it is simple - as I posted above, the human race is looking to understand / bestow order and logic - to frame how we live / where we came from / where we are going... If as humans we can do this in the framework of some randomly initiated mathematical model then people can feel comfortable and not challenged - they can carry on life in a fatalistic, selfish bubble... However, if this theory is not true, it leaves a gaping hole and questions to answer - if life didn't originate randomly, then there must be order and purpose to its creation - there must be a creator, and that means there must be a framework not created by humans - i.e. we are not fully in control and we would have to then understand what that means - what it requires of us - what choices and decisions we need to make in that new context - and that is scary for a lot of people - easier to invent a pseudo-scientific framework which requires no personal responsibility or action than to have to face up to needing to make choices in how we live our lives...