..”Bible is a book by men”...
Well you’re off to a hard start since the author would disagree.....seeing the Bible as just another book will interfer with your understanding...and therefore why you can see it as propaganda.
You can know any literature but if you don’t know the author you will miss much of the authors meaning....
Listening to your heart will certainly mislead you....emotions come and go and can run like water..and surely be wrong....
Doesn’t sound like you’re on very good footing to start with. Might want to check with God Himself, on all the above, before you form an opinion.
Sounds to me like you don’t believe in the “temple of the living God.” Well then, how about the Koran? That’s a book too.