I think you need to be careful. I know we live in a society that is tolerant of all religions, but such is not true world wide. In some parts of the world, Christians can be persecuted for their beliefs. You wouldn't want that to happen over a quilt you made out of the best of intentions on your part. I'd recommend checking with a higher authority at the charity first, but be prepared to do more generic quilts for overseas. After all, your whole point is to send quilts to people who need quilts, and that is God's work too. You can save the Christian themes for closer to home projects where you know they will be welcomed. Just keep thinking, in all you do, you are doing God's work, and I applaud you for it. May God bless you for your generosity of spirit.