People are never rational in all aspects of life. Faith is by definition not rational. When we have evidence for beliefs, which is what it takes for rational thought, one does not use faith. But the more "faith" that one relies on the less rational that a person is.
That's just your opinion as one who has no faith.
"Rationalism is wrong when it assumes that religion is at first a primitive belief in something which is then followed by the pursuit of values.
Religion is primarily a pursuit of values, and then there formulates a system of interpretative beliefs. It is much easier for men to agree on religious values—goals—than on beliefs—interpretations. And this explains how religion can agree on values and goals while exhibiting the confusing phenomenon of maintaining a belief in hundreds of conflicting beliefs—creeds. This also explains why a given person can maintain his religious experience in the face of giving up or changing many of his religious beliefs.
Religion persists in spite of revolutionary changes in religious beliefs. Theology does not produce religion; it is religion that produces theologic philosophy.
103:1.5 (1130.4) That religionists have believed so much that was false does not invalidate religion because religion is founded on the recognition of values and is validated by the faith of personal religious experience. Religion, then, is based on experience and religious thought; theology, the philosophy of religion, is an honest attempt to interpret that experience. Such interpretative beliefs may be right or wrong, or a mixture of truth and error.
103:1.6 (1130.5) The realization of the recognition of spiritual values is an experience which is superideational. There is no word in any human language which can be employed to designate this “sense,” “feeling,” “intuition,” or “experience” which we have elected to call God-consciousness. The spirit of God that dwells in man is not personal—the Adjuster is prepersonal—but this Monitor presents a value, exudes a flavor of divinity, which is personal in the highest and infinite sense. If God were not at least personal, he could not be conscious, and if not conscious, then would he be infrahuman." UB 1955
If you are ever able to get over yourself and be receptive to the gift of faith then religion would make much more sense to you.