Why do some 'christians' try to deflect the observation that there is no credible, tangible, verifiable,?

valid, or irrefutable evidence of any 'god' critter, with the argument that 'there is no evidence of evolution'? Do they not understand that trying to change the subject doesn't get them anywhere? Do they not understand that being an atheist has NOTHING to do with Cosmology, Abiogenesis, and/or Evolution? Why do 'christians' think that if they can knock a chink in these theories that, magically, they have 'proved' the existence of their 'god' critter, when it truth, few if any atheists BELIEVE in The Big Bang, Abiogenesis, or Evolution?