It's trendy these days to be anti colonialism, but as soon as you mention ireland all the support fizzles out. Fucks up with that? Most young people hate tories, hate british empire, etc etc, but then you say IRA and everyone gets scared. It's not even like my generation has an emotional attachment to it either - it's before our time
Most weren't taught the deep history of oppression by the British, or even if they do they can compartmentalize it as "that was a long time ago." For those who don't know much about it, the bombings seemed pointless in a modern setting.