Nest time don't take the Bible quote out of context.

Revelation 2:8-11

To the Church in Smyrna
8"To the angel of the church in Smyrna write:
These are the words of him who is the First and the Last, who died and came to life again. 9I know your afflictions and your poverty—yet you are rich! I know the slander of those who say they are Jews and are not, but are a synagogue of Satan. 10Do not be afraid of what you are about to suffer. I tell you, the devil will put some of you in prison to test you, and you will suffer persecution for ten days. Be faithful, even to the point of death, and I will give you the crown of life. 11He who has an ear, let him hear what the Spirit says to the churches. He who overcomes will not be hurt at all by the second death.

As you can see the quote is not calling the Jews satanist but is talking about those who have strayed from the faith and will persecute the faithful in the Church in Smyrna.