Maybe because they were actively avoiding civilian targets
And even then mostly because a lot of people were supportive of their cause even if they were against their methods
But IRA didn't win because those people supported their cause, IRA won despite those people being against their methods.
It was the force they used which directly led to the GFA, without the bombs and the killing the British would never have surrendered.
In signing the GFA, the UK effectively gave up on it's sovereignty over NI. That was never going to happen through "peaceful and democratic means"
It's difficult to make out if this is ignorance, a poor attempt at satire or simply trolling.
The border is in the North Channel today, so the bit about sovereignty clearly holds up.
Are you saying the GFA would have been reached through peaceful means?