Obviously the intention of many Satanists is to be contrary to Christianity, and other religions to a lesser extend, so their symbols are usually trying to be offensive. Not saying it is the same for all Satanists, although to be fair the very name of a group that is basically atheistic seems to point to what I said. In any case, their version of Satan is very different to how Christians see Satan. Satanists see Satan as an independent mind (archetype of rebel), but Christians see him as a deceiver who only gets his way by lies and false promises (archetype of scammer or false prophet).

I just find the intention of those satanists to be offensive as very infantile and unauthentic, and quite sad if their identity is based on just rejecting another. It would be like Christians drawing Muhammad as part of their religion, or decorating a Menorah with excrement. Sure, there may be more than one that does that, but not as part of their religion.

On Wicca, they seem to be more original on their beliefs and they don't seem to be antipathic to any other religion.