If you look at terrorism in the UK and Ireland, Islamic extremists are quite safe compared to the IRA. There were estimated to be over 10,000 terrorist bomb attacks due to the Northern Ireland conflicts.
I wouldn't say nobody did. There was certainly enough anti-Irish racism to wrongly convict people (Birmingham Six, Guildford Four, Maguire Seven). And the goal of the Loyalists was not so much to "deport" Catholics living in NI - they were after all born there and British nationals - but to force them to leave. Ethnic cleansing.
The situation was very weird - a civil war within the UK, effectively, complete with troops on the street and armed checkpoints - but only in very specific areas. A quasi-democracy operated: Gerry Adams MP was permitted to be elected but not allowed to speak on television. Bobby Sands was elected while in prison.
That's mostly true, but Irish men did come in for a lot of extra screening at airports, being taken into rooms for interrogation and so on. Particularly young Irish men with longer hair.
R
Rightwing reporting of incidents did a lot to drive anti Irish sentiment, leading to forced confessions by innocent Irish people for terrorist attacks like in Bermingham and Guilford.
Political leaders who liked to use zero tolerance rhetoric like Margaret Thatcher did a lot to help the IRA recruitment cause.
It was different, but not completely different to what we see now in the US.
By coincidence onetime IRA commander Martin McGuinness died today, a man who's conversion to pursuit of political aims through diplomatic conciliation rather than hardline methods is one of the great examples of how the former works better to end conflicts.
