Judaism is a Jewish religion, which is characterized by festivals and other religious practices. Judaism happens to be a very ancient religion. In all, it has maintained its value from those ages till now and uses art to educate others about it. Given its festivities, it is possible to come up with a creative poster. All one ought to know is exactly what happens during these festivals.
Then festivals of this religion
Judaism festivals are quite a number, and none of them should be misinterpreted for another. The whole point of using a poster is to tell facts about something, the same way it tells about the beauty. The two can only be achieved with incorporation of the right art print. This is the key factor to an appealing poster.
How decorative can Judaism posters be?
You can decide which manner you want them brought out in. You have the choice of framed art or canvas print. It is up to you, to consider the most convenient option for your home. If you want the poster to occupy a large surface, canvas print will be more economical and convenient to. Between the two however, framed art tends to be better when it comes to preserving art. Judaism is known, but not to all. You can try to create awareness about it by adding a simple poster on you wall. You only need to ensure that it carries the content of Judaism. That is enough for a start. With time, more will be learnt.