These groups didn't start their propaganda blitz simultaneously by coincidence.
Group-rights ideology lies at the core of the New Black Panthers, the KKK, Aryan nations, Hamas, and assorted lefty nutjob groups out there ... all of these groups rely on group identity to make themselves feel powerful, and to them, individual liberty is a threat as it allows people to choose to join groups or not join groups even if a group wants to assert its perceived "authority" over people it believes should belong to their group. Memebers of white supremacist groups - or black supremacist groups for that matter- are not content just to keep to themselves. They feel a need to force other white or blacks respectively to conform to their group ideology. Thus a white supremacist will persecute and harass whites who date nonwhites, and black racist groups will likewise persecute and harass blacks who date nonblacks. Both groups see intermarriage as a threat to the purity of their group. Thus black racists and white racists have far more in common than people think.
Palestinians terrorists behave the same way- they are driven to add members to their group and prevent members from leaving their group or adopting other identities, in order to appear strong by swelling their numbers and intimidating others so that none may dissent. Since Palestinian leaders are not so much racially or religiously driven as they are political, they have been able to assemble a larger base than black and white racists have been able to do. But while composed of many nationalities with little concern for racial makeup, the palestinians still retain an intimidating group rights mindset.
Islamicists are similar; they see people of other religions as threats to their group, because such people may draw off muslims from the group and convert them. Thus is believed to reduce the unity of the group, weakening it, and directly impact the Islamicists' goal to dominate the world both religiously and politically.
All of these groups fear individual choice...
So it is no wonder when they see a common threat to group rights ideology- and America is a threat to it - that they would put aside their other differences to preserve their groups.
Satanism? Isn't this becoming just a bit hysterical? Besides, from what I've heard, those who self-idenitfy as "Satanists" are basically atheists who don't really believe in an actual Satan, but just see it as a symbol for rebellion. They also tend to reject race-centered ideologies, since they're "radical individualists." Also, word has it that the head of the Church of Satan, Anton LaVey, was Jewish, so a lot of things just don't add up here.