Hee. My mom has dual US/Brazilian citizenship, she does that all the time (and there are certain parts of the world she won't use the US passport at all if she can help it).

Makes perfect sense - if you're "dual" in some way, it seems like a denial of who you are, some part of yourself, to do otherwise. In a way I've dealt with a version of this all the time, as a bi-ethnic person who looks just "white" and I feel it's important to point out that it's not that simple. :)

Your description of your faiths is beautiful, and I see no contradiction.