Security analyst Guido Steinberg said the public were desparate as Angela Merkel hopes to fight off Martin Schulz and secure a fourth term in office.
Mr Steinberg said they were worried after security services could not capture Berlin Christmas market attacker Anis Amri who used eight different aliases to collect welfare benefits in order to finance his horrific attack that left 12 people dead.
Amri was later shot dead by police in Italy after escaping across the border.
Speaking to Al Jazeera, Mr Steinberg said: “People here in Germany still wonder why with all our security services, with all the money that we spend, with all the taxes that we pay, our police is not able to capture a man, or at least survey a man, who is known to be a dangerous terrorist.
“That is unacceptable to most Germans and the problem is that our parties do not present any answers as yet.”
Angela Merkel is on course to win next month’s election according to opinion polls, though she could struggle to form a coalition and half of voters say they are still undecided, pointing to huge apathy towards her rule.
Her government was urged to tighten housing and deportation rules for refugees following a deadly knife attack in Hamburg last month.
The shocking killing has reignited a political dispute over refugee policy.
A 26-year-old Palestinian man living in a city refugee home has been identified as the sole suspect in the Hamburg attack.
He was awaiting deportation following a failed asylum application in December.
The issue of migrants has long been a losing battle for the Merkel administration, since the country opened its borders more than two years ago.
The association of towns and communities, which represents Local German authorities, has called on Berlin officials to pay more attention to how failed asylum seekers are dealt with.
The group has also called for closer monitoring of those considered potentially dangerous, insisting that they should be kept under closer centralised supervision instead of being allowed to live in private housing or smaller refugee centres.
Source : EXPRESS