Speaking to Joe Duffy on RTE's Liveline, Fr Roche said the priest officiating 'was up against it'
Fr Donal Roche, who was not officiating, said it was "very stressful" adding that they had asked gardai who said they would attend if anything happened, otherwise their presence would heighten the situation.
Speaking to Joe Duffy on RTE's Liveline, Fr Roche said there was a sense of “restlessness” and the priest officiating “was up against it”.
Maguire was one of three men killed on 7 July when their BMW ploughed into a truck on the N7 and burst into flames.
Maguire (29) of Tree Park Drive, Graham Taylor (31) of Kiltalown Park and Karl Freeman (26) of Rossfield Park died in the horror crash.
Family and friends of Maguire paid tribute to the Tallaght man at his private funeral at the Priory Church in Tallaght village which took place before his burial at Newlands Cross Cemetery.
One family member apologised to the priest on the altar “ for the language” before declaring “rest in peace ya f***ing legend”.
At the beginning of the service offertory gifts were brought up to the alter by his family and friends.
They included a torch and screwdriver, as well as cigarettes, his cap, newspapers, his keys, a Canada Goose jacket and his reg plate.
Floral tributes were also laid at the altar alongside his coffin, which read "Husband", "Maguire", "Son", and "Mad Man."
A poster was also created which featured a collage of images of the departed burglar reading: "RIP Dean. You know the score, get on the floor, don't be funny, give me the money."
The image has been widely shared on a number of social media sites.
Another Liveline caller named Majella said the scenes at the funerals of the three men were "stomach-churning".
During the show, Duffy read out the following statement from the Archdiocese of Dublin after they were asked their views about the perception that crimes are being glorified at funerals.
They said: "In a Christian funeral, we commend the soul of the deceased to the mercy of God. Out of respect for the family and loved ones of the deceased, it would not be appropriate to publicly comment on an individual funeral ceremony.
"Please be advised that a parish is not responsible for activity outside of its church. Funeral ministry guidelines of the Archdiocese of Dublin are available from the Dublin diocesan liturgical resource centre website."