Hello WUHL, nice to meet you and welcome.
What do you define as Christianity? SDA's believe and follow God's Word alone through God's Spirit. We believe that God has his people in every church but many of the churches have departed the faith (the Word of God) and are following man made traditions and teachings that break the commandments of God).
God is calling his people out from following these teachings that are leading His people away from God's Word back to the pure Word of God. This is because God is a Spirit and those who worship him must worship him in Spirit and in truth according to the Word of God. You will not find the answers to what you are seeking here.
If you want to know the truth of God's Word you need to go and ask JESUS and seek him through his Word and claim his promises. As it is written cursed is every man that trusts is man and makes flesh his arm. Some promises to get you started can be found here.. *JOHN 14:26; JOHN 16:13; JOHN 7:17; 1 JOHN 2:27; HEBREWS 8:11; Of course receiving God's Spirit to know his Word is conditional on believing and following God's Word * JOHN 8:31-36
May God bless you as you seek him through his Word.