Now, as the winter bites, those same unionists are themselves facing charges of trying to "wipe their hands of any involvement".
This time the accusers are the beleaguered Alliance party, whose offices and councillors have come under attack over their decision to vote in favour of flying a Union flag on designated days only over Belfast City Hall.
The two main unionist parties have condemned the carnage in Carrickfergus and the attack on the family home of two Alliance councillors in North Down as "legally and morally wrong".
But Alliance politicians continue to question these statements, pointing to the decision by both DUP and UUP councillors to distribute 40,000 Alliance-style yellow leaflets as a blatant attempt to ramp up tensions over the Union flag issue.
The unionists respond by arguing that Alliance and the two main nationalist parties are themselves to blame. The unionists argue that the flag has flown for decades above Belfast City Hall and the other parties should have left it alone.
According to the East Antrim DUP MP Sammy Wilson, Alliance was dangerously naÃ¯ve in not realising that its vote would "open a Pandora's box".
Both Alliance and Sinn Fein claimed the flag dispute was stoked up as part of a campaign to oust the Alliance MP Naomi Long from her East Belfast seat.
Unionists denied this, insisting their defence of the Union flag was a matter of principle.
Whatever the truth, there's no doubt that with the involvement of loyalist elements, and others using social media, the protests have taken on a life of their own, spreading well beyond central Belfast.
Now unionists at Stormont are calling for the Union flag to be flown 365 days a year over Parliament Buildings - a proposal that seems destined to divide the cross-party commission that manages the Assembly building.
The image of an MLA's constituency offices and politicians' homes coming under attack would be shocking at any time.
It's even more embarrassing on the eve of a visit by the outgoing US Secretary of State Hillary Clinton.
Like her husband Bill, Mrs Clinton has frequently pointed to Northern Ireland as an example to other trouble spots around the world, evidence there can be a peaceful negotiated way forward.
But the violence this week shows how easy it is to stoke latent tensions, and this time the Stormont politicians can't entirely blame a small unrepresentative minority.
In contrast to the activities of dissident republicans, this is a dispute in which, one way or another, the main Stormont parties are deeply embroiled.

Mr Beshira, 21, was pronounced dead on Kilburn High Road in north-west London at 17:20 GMT on Thursday after being shot in the abdomen.
A 22-year-old man was arrested on Saturday on suspicion of murder and remains in custody.
Metropolitan Police said they believe Mr Beshira was shot on Palmerston Road and staggered 200 yards.
Officers are searching for a man described as slim and white who was wearing jeans and a dark top with his hood up and the lower half of his face covered.
Members of the public were already attending to Mr Beshira, who had collapsed outside a cafe, when the emergency services arrived.
Witnesses described the area as "mayhem" after the shooting with reports of fights breaking out in a crowd.
Det Ch Insp Andy Partridge said the gunman was "loitering in and around Palmerston Road and the Webheath Estate prior to the attack".
He said: "We know the area was extremely busy at the time of the shooting.
"I am convinced that other members of the public have either seen the incident itself, or have seen the suspect arrive at the scene or flee after the shooting."
Over the summer the UK government, in the shape of the former Northern Ireland Secretary Owen Paterson, was accused by unionists of acting like Pontius Pilate, washing his hands of decisions on parades.
[NEXT_CONCEPT]
Detectives have identified a man who was shot and killed on a busy street as Yasir Beshira.