Grimsby MP Austin Mitchell said attacks on mosques and other Islamic institutions were playing into the hands of terrorists who wanted community conflict.
Mr Mitchell told BBC Radio Humberside: "It's sheer, simple stupidity. I'm appalled and shocked. I didn't expect this in Grimsby.
These idiots, whoever they are, are playing directly into the hand of the terrorists.
A mosque chairman has spoken of the petrol bomb attack on the Grimsby Islamic Cultural Centre last night.
Diler Gharib was inside the centre with a young family when it was targeted by arsonists.
He told the Grimsby Telegraph: "We had just finished our prayers and were discussing how to thank our neighbours for the support they have shown us over the past few days when we heard a bang and saw fire coming under the door."
I grabbed a fire extinguisher and put it out and then two more petrol bombs hit the fire escape and the bin so I had to put those out too.
Two people have been arrested following a fire at an Islamic cultural centre in Grimsby, Lincolnshire, police said.
Humberside Police have arrested two people this evening, after an officer came across the fire at the Grimsby Islamic Cultural Centre on Weelsby Road, shortly before 2200hrs (Sunday 26 May 2013).
The fire was extinguished and no one was injured as a result.
It is too early to speculate why the fire was started, however anyone with any information who could assist officers as part of the investigation are urged to call the Humberside Police non-emergency number 101, quoting log number 778 of 26/05/2013.
The funeral of the family killed when their car collided head on with a lorry near Grimsby will take place today.
Forty-eight-year-old David Cockburn and wife Angela, 48, were driving with their daughters, 21-year-old Carly Cockburn and 18-year old Bethany Cockburn to a dancing competition at Butlins, in Skegness.
Both of the girls had won dozens of trophies in freestyle dance contests, Bethany's daughter, Lacey Jade Stephenson was also in the car at the time of the crash.
Police are still investigating what happened on April 12 when the family's Nissan Primera hit a light goods vehicle.
The service will take place at St Johns Church, in Birtley, Gateshead, at noon, followed by committal at Saltwell Crematorium.
The funeral of the five family members killed in a crash on the A18 near Grimsby will take place today.
Forty-eight-year-old David Cockburn and wife Angela, 48, died along with their daughters, 21-year-old Carly Cockburn and 18-year old Bethany Cockburn when their car collided head on with a lorry on April 12.
Bethany's daughter, Lacey Jade Stephenson who would have been two next month, was also killed.
The funerals will take place today in Chester-le-Street, County Durham at midday.
The father of a man whose son died on the A18 in Grimsby has said the death of the family of five has brought back memories of his painful loss.
Adam Nurse who was 18, died four years ago when he lost control of his car on a bend and hit a tree. It is the same road where the Cockburn family from Durham tragically died on Friday afternoon.
Adam's father Nigel Nurse says speed limits should be reduced from 60mph and there should be more signs warning drivers of sudden bends and dips.
The former headteacher of Carley Cockburn, who died in a car crash along with her family in Grimsby, has paid tribute to a 'talented' young girl.
A picture has been released of the family that died in a head-on collision near Grimsby.
David Cockburn, 48, his two daughters - Carley Ann Cockburn, 21, and Bethany Cockburn, 18 - and Bethany's daughter, Lacie Jade Stephenson.
A fifth family member has yet to be identified by police.
Hundreds of people have left their condolences on a special Facebook page set up in tribute to the family that died in a head-on collision near Grimsby.
More than 33,940 people joined the R.I.P Cockburn Family page on the social networking site within a few hours.
One person posted, "So so sad xx dancing with the angels now x R.I.P xxx".
Another left a message that read, "Dance in heaven beautiful angels x".
Many left anecdotes about the family on the page, with one describing Mr Cockburn as "a gentle kind man" who was "totally devoted to his family".
A number of people also posted tributes on Bethany Cockburn's personal Facebook page, on which she described daughter Lacie as "Our world!".
Four of the five people killed in yesterday's car crash near Grimsby have been named by Humberside police.
The family were travelling to the Butlins holiday camp in Skegness for a dance competition.
ITV News' Ben Chapman reports.