The five time world champion responded to a post on X made by Varadkar about Emily Hand who was returned to her family over the weekend.
Varadkar described the child as being "lost" and claimed she "has now been found and returned."
McGregor noted that the 8-year-old child was "abducted by an evil terrorist organisation," adding "What is with you and your government and your paid for media affiliates constantly down playing / attempting to repress horrific acts that happen to children."
The MMA legend continued, "You are a disgrace. The day after a stabbing of children in Ireland, NOT ONE PAPER HAD IT ON THEIR FRONT COVER. We will not forget."
As we previously highlighted, McGregor has been outspoken about the impact mass migration is having on his homeland, remarking, "Ireland, we are at war," and following the stabbing of three children by an Algerian migrant in Dublin last week, he slammed authorities for targeting Irish people who rioted in the streets in response.
McGregor's comments have prompted Irish authorities to start an investigation to determine if the fighter has violated 'online hate speech' laws.
She was abducted by an evil terrorist organization. What is with you and your government and your paid for media affiliates constantly down playing / attempting to repress horrific acts that happen to children. You are a disgrace. The day after a stabbing of children in Ireland,… https://t.co/YKyviZDLfW— Conor McGregor (@TheNotoriousMMA) November 26, 2023