The Barnabas Fund campaigns for persecuted Christians around the world and has organised the closed conference.
Fawaz Gerges, Professor of International Relations at London School of Economics, told The Independent: "The counter-terrorism workshop is counterproductive.
"It does not serve the interests of the churches of or the community at large.
"It plays into the hands of the extremists by hyping up a threat that does not exist, to the best of our knowledge."
Director of the University of Buckingham's Centre for Security and Intelligence Studies, Professor Anthony Glees agreed: "We haven't been made aware of any intelligence threat that Isis is planning to attack churches in this country.
"There is a slight risk to Christian churches given Isis's history of targeting them in France and Egypt, but it should certainty not be exaggerated in the absence of indications to the contrary."
The conference is expected to discuss how churches and faith groups can take steps to make their buildings more secure.
A Church of England spokesperson said the Church was not willing to comment prior to the event.
