Former Tory cabinet minister Norman Tebbit said he hopes Martin McGuinness is "parked in a particularly hot and unpleasant corner of hell for the rest of eternity".
The peer, whose wife Margaret was paralysed when the IRA bombed a Brighton hotel during a Conservative Party conference, said the world is a "sweeter and cleaner" place now the former deputy first minister is dead. Lord Tebbit branded the former IRA commander a "coward" and insisted he had only turned to peace to "save his own skin".
"I'm just pleased that the world is a sweeter and cleaner place now. He was not only a multi-murderer, he was a coward," he told the Press Association.
"He knew that the IRA was defeated because British intelligence had penetrated right the way up to the Army Council and that the end was coming.
"He then sought to save his own skin and he knew that it was likely he would be charged before long with several murders which he had personally committed and he decided that the only thing to do was to opt for peace.
"He claimed to be a Roman Catholic. I hope that his beliefs turn out to be true and he'll be parked in a particularly hot and unpleasant corner of hell for the rest of eternity."
The 1984 Brighton bombing of the Grand Hotel in the middle of the night killed five and left many injured.
But Jo Berry, the daughter of Conservative MP Sir Anthony Berry who was killed in the bombing, said Mr McGuinness should be remembered for his efforts to build peace.
"Today is a day to really appreciate what he has achieved. His legacy is one of reconciliation and peace-building...What we have now is so much better than what I grew up in. What we have now is peace," she said.
Martin McGuinness was a man of impeccable manners. He was usually unfailingly polite and he was kind-hearted. This description may not fit the stereotype some would like to portray of a man who was active for a number of years at a high level in the IRA, but it accurately reflects the Martin McGuinness I knew very well for over two decades.