Our Lord, J.C.

[Brenus]

He is saying that he condemns both side for the use of violence.
Listing to your link... It is useful.
Even if the questioner tries to show him as a IRA supporter, try to listen to the answer, not the question...
After 4 times, I understand the click.

Do you condemn the the use of force by the British Arm Forces? Do you condemn the Protestants terrorism? Funny that these question are never asked to rightist politicians.

Remember what was to be a Catholic in Northern Ireland?
http://www.bbc.co.uk/news/uk-northern-ireland-21959048

http://www.irlandinit-hd.de/main_chap/need.htm

"Why else would the catholics be so inflexible and insist on using the front door to their school?" If you would bar my children to go to school by the front door, I would put bombs in the Country helping the ones doing so. The they don't care of my children, why should I care of their and them?
So, Corbyn is condemning both sides, rightly, as it should have been resolved politically, before any violence became the only way to communicate.