Advertise on Twitter, Instagram and Facebook using an impossible to obtain username such as #GOD. Just kidding... sort of...
Rather than embracing the present, stick with the old brand favorites. The Abrahamic Divinity prefers to communicate with us mortals through prophets but since He is addressing at least three audiences, He should manifest at least three spokespersons, each an incarnation of a significant historic person in their target religions. For Judaism and Islam, these spokespersons would be prophets, and for safety sake, the Christian spokesperson should probably be one (or more) of the Apostles. Innacting the Second Coming as an opening move in His reintroduction, might trigger Armageddon, so the Jesus card should either be held for later, or retired from the deck.
Manifest each of the spokespeople in authentic garb (prove-able by carbon dating), speaking in their historically accurate languages (leave it to our modern day scholars to figure out what they are saying) and deliver them to sacred places that would be inaccessableinaccessible by natural methods. If possible, make sure that their arrivals are captured by multiple video cameras or at least a flock of teenagers with cellphones.
The reason for considering multiple spokespersons for Christianity has to do with that religion being rather divided and diversive all on its own. One of the apostles could manifest in the Pope's bedroom while another might materialize along side a TV Evangelist during a live-audience show. If the Jews and Islamic need multiple spokespersons, go ahead and send them in. The more the merrier!
Once all the players are in place, start the play. Have each of them start explaining how the faiths they represent are incorrect. Remember, that no one will understand them at first, but what they say will get captured on video and translated later. Then wait, while the human authorities arrest them and hall them off to prison.
Once they are behind bars, have them prophesize in modern tongue to the other prisoners and guards. Then when everyone's eyes are on them, have them vanish and rematerialize in their original arrival locations.
Repeat as necessary until the authorities give up; adding other miracles such as bullet-removal and healing as needed. Once the human powers-that-be admit defeat, invite the scientists and scholars and start the re-education.
Start by asking for questions that only top scholars and theologians can answer. Provide the prophets with the expected answers, clarifying each answer with missing unknown but proveable knowledge where appropriate. In short order, the scientists, scholars and theologians will also give in and accept defeat.
Only then is the Abrahamic Divinity ready to become manifest. Have each of the now famous prophets lead their respective camera crews and journalists to a single, previously unholy location, maybe someplace really beautiful that God is proud of creating. Then and there, with all the world watching,...
Come on stage and take a bow!
