1. It is very interesting and even fortunate kwamba hitimisho lako ni "amini Mungu tu." It is the same faith that keeps us believe that He is living, powerful and loving. He has been revealing Himself throughout history, since the beginning of time; He has had His followers ever since, He has talked with, walked with and instructed them personally and through writings. Through nature and personal experiences, one can understand with surety that He is ever close to humans. We are not left alone to wallow in this Planet Earth.
2. The religion may seem to "make no sense" to some unscrupulous individuals, but that does not in any way invalidate its genuiness and its usefulness and its inevitableness. The fact that religion does not always make sense is one of the greatest evidences in support of its divine precedence. This is why we must believe, as you rightly said.
3. Dini wala haiko kwa ajili ya wanadamu "kutishia na kutawala wenzao." The whole point of religion is that of understanding who God is, and that He dearly loves all people and He has wonderful eternal plans for each one of us, you included.
4. "Jicho kwa jicho; jino kwa jino," just as it sounds, is not a rounded, complete, divine injuction. It is simply a portion of the whole story. And there are countless references within the same document unazoweza kuthibitisha what is actually the case. Even more importantly, it is not a haphazard, arbitrary injuction, as you would like it to be, but rather an official mandate that had been previously delegated to be enforced by responsible authorities which are installed through God's permission and are thus recognized by Him.
5. Mungu never directly wrote any of the books that we have them today as His Word, but He did inspire those servants, saints and people who wrote them! Get that?