To those believing Jesus NOT to be “the only true God”: Why does God let His angels worship His firstborn, when God allows worship only of Himself?

Hebrews 1:6 (NIV) says: > when God brings his firstborn into the world, he says, “Let all God’s angels worship him.” My question is for those who **don’t** believe Jesus to be “the only true God”: Why the command that the firstborn should be worshipped by God's angels, something that God said in clear terms, He only allows for Himself? Exodus 34:14 says: >Do not worship any other god, for the Lord, whose name is Jealous, is a jealous God. Quotes from Unitarian or Jehovah’s Witnesses sources or scholars making sense of this are welcome.