What do Evil Temples Look Like?

This is the Luciferian Church, "Seeds of Light" in Colombia. How does "Evil" translate as part of religion in D&D? Is it accepting with a mind for expansion?


Are they pugnacious? Then how would they fit in? This isn't necessarily a hard thing. Just separate the "good" from the "bad." We have the Ogre Kingdom here and the Human Kingdom there. And they fight. 'Nuff said.
Or is it more interesting than that?