He shared his thoughts on X in response to Garda commissioner Drew Harris referring to the protesters as a ‘hooligan faction driven by far right ideology’.
Three children aged between five and six, and a woman in her 30s, were hospitalised after an attack outside a school in Dublin city centre this afternoon.
He has used his platform to call for action and criticise the chief of police.
McGregor said: ‘Innocent children ruthlessly stabbed by a mentally deranged non-national in Dublin, Ireland today.
‘Our chief of police had this to say on the riots in the aftermath. Drew, not good enough.
‘There is grave danger among us in Ireland that should never be here in the first place, and there has been zero action done to support the public in any way, shape or form with this frightening act.
‘Not good enough. Make change or make way. Ireland for the victory. God bless those attacked today, we pray.’
Irish police have not yet confirmed the nationality of the ‘person of interest’, a man in his 50s, who was hospitalised with serious injuries following the attack.
McGregor has since sent out further tweets, saying: ‘You reap what you sow.
‘Any update on the wellbeing of those stabbed today? Absolutely horrific scenes all day, my stomach is churning.
‘With no action being taken at all during these ever more frequent events, like literally zero action taken whatsoever, how do we expect an end to this?
‘We need reform. We need action!’
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