Questions on Delusional Thinking

If I claim I can shoot fire balls out of my hand, most people would say impossible.

If I claim a person in the past could shoot fire balls out of their hand, most people would say impossible.

If I claim I can walk on water, most people would say impossible.

If I claim a person was able to water on water a long time ago, suddenly I can be taken seriously.

Why do so many people not see the logical inconsistency here? Why do people not see that believing certain religious thoughts are a delusion?