"In 1986, Corbyn was arrested with 15 demonstrators protesting against the trial of a group of IRA members including the Brighton Bomber Patrick Magee. Magee would be found guilty of murdering five people. After refusing police requests to move from outside the court, Corbyn and the other protesters were arrested for obstruction and held for five hours before being released on bail, but were not charged. Following the 1987 Loughgall ambush, in which eight IRA members and one civilian were shot dead by the British Army in an operation to defend a police station, Corbyn attended a commemoration by the Wolfe Tone Society and stated "I'm happy to commemorate all those who died fighting for an independent Ireland."
In the early 1990s, MI5 opened a temporary file on Corbyn to monitor his links to the IRA. The Metropolitan Police's Special Branch monitored Corbyn for two decades, as he was "deemed to be a subversive", someone who might "undermine ... Parliamentary democracy". He appeared at a number of Republican protest events. According to The Sunday Times, following research in Irish and Republican archives, Corbyn was involved in over 72 events connected with Sinn Féin, or other pro-republican groups, during the period of the IRA's paramilitary campaign."
Not only did he betray his country he made a laughing stock of himself with the IRA hierarchy thinking he could be their best friend.