I think in all seriousness if you are going to consider and honestly question your current faith/beliefs, working from a dream you had, isn't a good starting point. Second, you speak with those who are of a solid understanding of each faith respectively. Does that they say make sense to you, does it mesh with what you feel? Does it challenge you, and if so, what are those challenges?
As willy nilly as people are about what they believe, it sure is a major part of your life and will impact how you perceive the world. Will you truly and honestly follow the faith you "choose" anyhow, or are you looking to just belong somewhere? Will you be religious about your faith, going through the emotions, or will you truly try to understand it, embrace it, and live it?
There are as many snake oil salemen (if not more) in religion than there are anywhere else. Start with the "good books" and go from there. But I highly doubt God would give you a dream punishing one type of "faith" and not the other. I don't think I've read a single line of any Scripture where he "led" someone to a certain faith by having them perform acts of violence. Satan, whether you believe in him or not, probably wouldn't take the time to screw with one of your dreams... it was a dream, it functions off of your subconscious, and many times what you've thought about during the day, or past few days can creep into your dreams and twist depending on how radical your imagination is.
One should almost certainly be separate from the other.