This is becoming THE standard "anti-terrorist" tactic in US-vassal-states as well. Canada has at least 3 similar "cases" where the accused were aided, abetted and incited by "enforcement investigators". Back when laws/justice were close to balanced, this was called police entrapment or outright fraud.
There is no factual or statistical basis for the domestic "war of terror", so such threats must be created, often out of nothing, to support the political/enforcement rhetoric and the bloated "security" budgets required to spy on and jail innocent people.
In Canada and Britain, laws which "legalize" these fraudulent "cases" is imminent, as the courts and juries are loathe to convict people whose only "crime" was mental illness and/or radicalized thoughts conveyed and worsened by "enforcement investigators".
The "Big Man" tactic has been all but outlawed in Canada, so the Harper gov't is using other means, (deportation of students/landed immigrants is a new fave) to claim "progress" in the GWOT.