i think the above article has been translated from some other language by a non scholar or it is a grevious attempt at some sort of intricate conspiracy
scholars like imam Bukhari ra have done a great job, and service for our better understanding. i thank them, and may Allah swt grant them jannah for their efforts. theyve always maintained worship is for Allah swt alone
All messengers are not the same because only prophet Muhammad peace be upon him was the universal prophet. its his example (from sunnah) which is our goal:
translation an Nisa 79-80
We have sent you, O Muhammad, as a Messenger to mankind, and Allah’s witness suffices for this. Whoever obeys the Messenger, in fact, obeys Allah and whoever turns away from him (is accountable for his deeds); anyhow We have not sent you to be keeper over them.
tafsir and proof of Example status
we can obey Allah only by obeying His Messenger, for no other way of obedience is genuine. As a corollary of this, the breach of allegiance to the Messenger shall be a rebellion against the Sovereign, Whom he represents. A Tradition explains the same thing thus: “Whoever obeys me, obeys Allah and whoever disobeys me, disobeys Allah.”