Dawood, you wrote "Where is the prohibition related to circumcision that you want to prohibit? None whatsoever. Since this was the Ibrahimic practice in vogue at the time of the prophet, God could have prohibited it if He desired so as He highlighted many transgressions of both polytheists and the people of the book. Yet, he did not do it, clearly sanctioning it implicitly."
Do you have proof from the Quran that it was in vogue at that time? No. Mentioned in hadith and carried on by ancestors but not sanctioned by Quran so you are engaged in ancestral worship, not Allah!
Call to salat is in Quran but azaan is not.