First off, the idea that all people in a particular group are evil is just ridiculous. Every group will have good and bad people. The general idea that Pagans are evil is insulting and hurtful and is born largely out of ignorance concerning their beliefs and practices. Most Pagans would consider themselves to be good, and many non-Pagans would agree.
Every human being is capable of doing good or evil, right or wrong. You could even do both in one day. It’s not right to lump all people of a given kind into a group and say they’re bad. It’s also unreasonable to think that all people in any group are good. We’re all shades of gray. While some people may do horrible things, that doesn’t mean that everyone does. There are rotten apples in every bunch.
As for worshiping Satan, pagans do not worship it/him. As a Christian construct, it has no place in their belief system. Most of them don’t even believe that it exists, so they can’t worship something that they don’t even believe in. Satanists are a totally different thing from Pagans. Some try to put Satanists under the Pagan heading, but even they typically rail against this. So, if a Satanist refuses to identify as Pagan, then Pagans obviously cannot be Satanists.
Even though there’s a long history of certain religions thinking that all magick comes from Satan, and therefore anyone who uses magick worships Satan, it isn’t true. Not everything that isn’t Christian comes from the devil. Pagans may believe in a wide variety of deities and entities, but Satan is not among them.
*Disclaimer: I no longer practice Paganism, but I’ve left these Pagan Myths articles active because I believe they’re still valuable in helping people to understand Paganism and reduce negative stereotypes.*