Are the things on this website true?
I posted some of it below under the link.
If these folks’ only peculiarity was that they met on Saturday to worship, we would have very little to worry about. But, they teach that Sunday worship is the Mark of the Beast, and Sunday worshippers, they teach, are Satan worshippers. They may deny this, but as long as they keep quoting Ellen G White, they must have this vulgar heresy stuffed right back down their throats until they repent. Ms White was a heretic, and she added to the Scriptures.
Ellen White founded the Seventh-day Adventist church and members must vow
to believe that she was a prophet! From the 27 Fundamental beliefs, #17 “The gift
of Prophecy: One of the gifts of the Holy Spirit is prophecy. This gift is an identifying
mark of the remnant church and was manifested in the ministry of Ellen G. White.
As the Lord’s messenger, her writings are a continuing and authoritative source of
truth which provide for the church comfort, guidance, instruction, and correction.”