You have the right to hold any beliefs you wish. Control over the contents of your own mind is your constitutionally guaranteed individual liberty. Control over the contents of other people’s minds, however, is not guaranteed.
You are not the only one married to wrong beliefs, such that you feel the powerful need for external validation. Creationists base their entire worldview and model of human morality around their beliefs. They feel the same powerful need for external validation, hence their non-stop struggle for over a century to topple evolution in public schools.
Are they also entitled to our belief? They’re human beings, just as you are. They have feelings, just like yours, which are equally hurt when beliefs central to their identity are challenged. If we make an exception for you, why not for them as well?