Minister for Justice Helen McEntee has been accused of engaging in "make believe and delusion" by claiming that the streets were safe when there was mob rule in Dublin last Thursday.
Sinn Féin TD Louise O'Reilly claimed everyone saw that trouble coming that afternoon - except the minister "incredibly".
She said that in any other profession, the person responsible would be sacked after such an unprecedented and catastrophic failure.
However, Ms McEntee said those responsible for the violence on the streets will be held responsible and brought to justice.
She told the Dáil that last Thursday night "we saw the best of An Garda Síochána coming together to protect our city".
Labour leader Ivana Bacik said Opposition parties were still waiting on a clear message from the Government on what action it was going to take to ensure last week's scenes would not be repeated.
She said it was clear for years that there were not enough gardaí on the capital's streets and she claimed the Government had adopted a "hands-off approach" when it came to policing the far-right.
Ms Bacik said it had been "farcical" for Ms McEntee to ask the Policing Authority to review the use of force by gardaí when garda management had responsibility.
In reply, Ms McEntee said she had secured €10m in additional funding for garda overtime in Dublin. In addition, she said, up to 800 gardaí would be in training this year and as many as 1,000 next year.
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She said the Government had increased garda training allowances in the last Budget to make it more appealing and the vast majority of new recruits have gone to Dublin.
The minister said two garda stations in Dublin were open that had not been open before she took office.
X did not engage with garda requests – McEntee
Ms McEntee told the Dáil that X (formerly Twitter) did not engage with requests from gardaí to take down posts, as violence flared in Dublin last Thursday.
Taking further questions in the Dáil, following Leaders' Questions, Ms McEntee said that she had spoken to a detective "who was actively engaged with the social media companies throughout Thursday".
That detective said that TikTok and Meta "were responding, they were engaging with gardaí and they were taking down these vile posts as they came up", Ms McEntee said.
"X were not. They didn't engage. They did not fulfill their own community standards," she added.
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The Government will provide all the support needed to allow children and staff caught up in last Thursday's violence "to return to normality", the minister also said.
Cynical distraction – ICCL
Executive Director of the Irish Council for Civil Liberties, Liam Herrick, has said it was "cynical distraction" to suggest that the problems experienced during the Dublin riots were in any way linked to too much oversight of gardaí.
Mr Herrick said this implies that the problems, which "run very deep", can be reduced to a suggestion of either light touch or heavy-handed policing.
He said the use of force was fundamental to policing and it was a failure of garda management if gardaí carrying out public order functions are not properly trained.
He added that it was absolutely the responsibility of garda management to make clear to members what the law is on the use of force and provide adequate training and skills so members can make educated decisions around the use of force.
Additional reporting Mícheál Lehane
