Jesus was sent to the earth (trans-dimensional travel/ not REALLY virgin birth)
to change people from a nationalistic orientation
to a planetary/universal paradigm.
The capital of the earth is the New Jerusalem - the Jerusalem above.
The objective was never to convince the whole world
by means of miracles (cognitive bribes). Humans have to
experience the contrast between destructive nationalism
and the conserving power of cooperation.
A long-range objective as humanity is groomed into an acceptable segment of that larger society?
All Bible miracles, every single one recorded, are theoretically possible given the proper technology. Most of the feats attributed to the ancient Gods of Europe, Africa, Asia, and the Americas are similarly possible given the appropriate technology. The descriptions of the miracles were not penned by the persons USING the technology, but by witnesses to the events or people to whom the tales were told.
In my opinion, reports of miracles could very well be evidence of advanced technology perceived by primitive minds.
In that sense, miracles still happen daily. Moreso now than ever before. Heck, miracles have become downright commonplace in the Information Age.