He was speaking after the party launched their manifesto in Derry on Thursday.
Councillor Tierney said the party are good at making promises, but have continually failed to step up to the mark.
Said Cllor Tierney: “There were many promises made by People Before Profit at their manifesto launch in Derry today, but it’s easy to promise people the moon and the stars when you know you’ll never actually be in a position to deliver on it.
“Instead of focusing on practical solutions and working with other parties to improve the lives of people across the North, in reality PBP offer nothing more than protest politics and hot air.
“Any time PBP have actually been in a position to make a difference, to contribute to the greater good they have failed spectacularly.
“This is the party that advocated strongly for Brexit in the full knowledge of the economic hardships it would cause for families in Derry and across the North.
“We warned it would have dire consequences, not just financially, but for community and international relations and yet they championed it all the way.
“The party’s mask slipped once again earlier this month when the party failed to support tougher sanctions on the regime of Russian war monger Vladimir Putin who is committing horrific war crimes on the people of Ukraine.
“While the rest of us have come together in solidarity for the Ukrainian people, PBP have once again found themselves on the outside and their excuses just don’t wash.
“Even at council level in Derry when PBP have had the chance to help families dealing with the spiralling cost of living they have been found wanting.
“When the SDLP voted against a rates increase for families who are already on their knees, PBP, the supposed defenders of the working class, couldn’t even be bothered to turn up.
“This is the real PBP, a party that would rather be out protesting and rabble rousing than dealing with the issues impacting people in their everyday lives.
“Empty rhetoric won’t put any food on the table or heat a single home.
“We need to put our faith in parties and politicians who are determined to put people first and deal with the issues that matter,” added the former Mayor of Derry and Strabane.Tags: