Our Father.  He is the Creator and source of life of all. He is the One who gave  His only son Jesus Christ for our sins.  He still waits for us.  For a start please read the Parable of the Prodigal Son. Luke 15:11-32

Revelation 12:9 clearly speaks about him.   He can disguise himself as an angel of light and confuse people into believing that he is from God or he is Jesus.2 Corinthians 11:14.  He is also called the Father of Liars (John 8:44).  He has spoken lies since the beginning and is the real cause of the fall of mankind.

They are ministering spirits for the true and chosen believers.  Read  Hebrews 1:14, Psalms 91:11, Psalms 34:7, and Luke 4:10.

Jesus Christ dwells amongst us through His Holy Spirit, thus He is the Holy Spirit. “Now the Lord is that Spirit: and where the Spirit of the Lord is, there is liberty.”(KJV) 2 Corinthians 3:17.  The Trinitarians address the Holy Spirit to be another being and god in the Trinity.  This is a false doctrine, costing many their salvation. Also read John 20:21-23,

Yes!! Idol Worship is a Sin.  We worship a living God and his Son Jesus Christ.  You make idols of dead people. Moreover, the 10 Commandments ( Read Exodus 20) commands us not to make any idol.  It is a sin. Also read Leviticus 19:4, 1 Corinthians 10:14 and Galatians 4:8.

 1 John 3:4 “Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.” ( KJV) To break the 10 Commandments is Sin. James 4:17, Romans 6:23, John 8:34, and 1 Peter 2:24.