Firstly, there are many disciplines of science, and certain creationist beliefs do not reconcile with theories such as Darwinian evolution, or some aspects of modern anthropology. The origins of life are unprovable from both sides of the argument.
There are different types of creationism. I could be considered a ‘creationist’ since I believe in God and the creation of life, rather than evolution. However, I believe in the concept of micro evolution rather than macro evolution.
Darwin’s concept of evolution (which is the basis for the modern theory) is just as unprovable as the creation of Adam and Eve. The dilemma of the chicken or the egg still has not been resolved.
From a philosophical viewpoint, the idea of a ‘primordial soup’ being the basis for the origins of the first life forms is vastly more difficult to accept than the initiation of life by a creator. Deductive reasoning can be employed in many thought expirements in this regard.
In any case, certain creationist beliefs can reconcile perfectly with every aspect of provable science or sound (mathematically provable) scientific theory.
The belief in certain types of creationism, and the acceptance of provable and observable science can reconcile perfectly.
But let’s not diverge from the topic, I was just setting the record straight.
The denial of provable science, math, evidence, and the paranoia associated with the related conspiracy theories, and the behavior in general that flat earthers exhibit can by no doubt be attributable to mental illness. There is no other explanation. A close relative of ours went insane some time back, and talking and trying to reason with him is absolutely no different.