Here is what Msgr. Rossetti wrote on his website:
As Christ taught:
“By their fruits you shall know them. Do men gather grapes of thorns, or figs of thistles? Even so every good tree bringeth forth good fruit, and the evil tree bringeth forth evil fruit. A good tree cannot bring forth evil fruit, neither can an evil tree bring forth good fruit. Every tree that bringeth not forth good fruit, shall be cut down, and shall be cast into the fire. Wherefore by their fruits you shall know them.” (Mt. 7:16-20)
and
“For there is no good tree that bringeth forth evil fruit; nor an evil tree that bringeth forth good fruit. For every tree is known by its fruit. For men do not gather figs from thorns; nor from a bramble bush do they gather the grape.” (Luke 6:43-44)
Christ was the greatest exorcist of all time, of course, but after Him is the towering figure of Fr. Gabriele Amorth. The latter was outspoken on the subject of Medjugorje; he had no doubt as to the authenticity of Medjugorje. His opinion can in no way be ignored. He knew the devil very well and his activity. And all official exorcists are consummate experts on the forces of darkness and light. Although the devil hates Medjugorje, the Vatican has already approved of “devotion linked to Medjugorje,” which bodes very well for its eventual approval by the Church.
A video interview of American exorcist (and psychologist) Monsignor Stephen Rossetti in Medjugorje was published on YouTube. He has been there several times now and this time he went with his exorcism team. He clearly believes in the authenticity of Medjugorje. Watch this video yourself:
Also, here is a short video of a homily of his during this same pilgrimage to Medjugorje:
Finally, here is a video of his talk at the 2023 National Medjugorje Anniversary Celebration: