A post on tumblr that has been making the rounds really caught my eye, that seemed to propose satanism as an acceptable way of thinking:
Those interested in this line of thinking may actually find themselves to be more of a biblical Christian than they realize.
I propose that the kind of Christian who believes that God lays down the law and that’s the final word, are wolves in sheep’s clothing, perhaps even believing they are sheep among the flock. When the sheep is shorn, however, they are revealed for who they really are: actually in opposition to Christ.
Among Christians, there is a term that floats around called “legalism” and many try to falsely insert legalism into Christianity, when instead Christianity is anti-legalism.
Legalism attempts to establish that the [laws of the Old Testament] (henceforth “613”) are still in effect, whereas, the 613 are not in effect, actually. Legalism is incompatible with Christianity, because the essence of Christianity is that Christ fulfills the law on behalf of those who accept his help: those who are in Christ are not under the law, because it is upon Christ’s record of obedience that judgment of them is made, not upon their own records of obedience. The pursuit of righteousness (obedience to the 613) is not that which gains salvation from the law, in Christ.
What then shall we say? That the Gentiles, who did not pursue righteousness, have obtained it, a righteousness that is by faith; but the people of Israel, who pursued the law as the way of righteousness, have not attained their goal. (Romans 9:30-31).
For the law of the Spirit of life in Christ Jesus has set you free from the law of sin and of death. (Romans 8:2)
Therefore, there is now no condemnation for those who are in Christ Jesus (Romans 8:1)
Christians who declare that the law is still in effect, are in overt contradiction to scripture that clearly states the law is no longer in effect. That is, in fact, good news — and that is what makes those in favor of the above satanism descriptions actually quite a bit more like an actual biblical Christian than the so-called Christians who try to subject everyone to religious laws. Christians live in a state of forgiveness from the law and are not subject to it.
Likewise, those who propose the law still holds water are more like until the so-called satanists they believe themselves opposed to:
(a) If idolatry or false-god worship is forbidden by the first commandment, and
(b) the 613 are still in effect, and
(c) the bible is the exclusive source for discerning the identity of God, and
(d) worshipping a half-truth version of God is idolatry:
then, those who proclaim that the 613 is still in effect are worshipping a false god, and are not Christians by their own definition of Christian.
In fact, the book of Galatians in the new testament, is a letter written by Paul to the church of Galatia, specifically to reprimand them for trying to declare that you must have both Christ and righteousness, and how that idea is wrong.