From the 1920s until the 1990s Northern Ireland was not really a democracy. It was a state with one party rule where one community dominated the other and excluded it from power.
Those wishing to change things had options other than bombs, as demonstrated in the American Civil Rights movement and in India. There were plenty of people on the Catholic/Nationalist side who abhorred the rise of armed militancy and returned SDLP councillors and MPs to elected bodies year after year, and on the other side Alliance and moderate unionists. For the most part, people in the late 60s who went on Civil Rights marches in NI just wanted civil rights. That movement was in many respects hijacked by the Provos, who had a different aim - unifying Ireland and destroying both northern and southern political entities. Hence the bombs.
Who knows what the outcome might have been if peaceful marching and focus on a political solution to the issues within NI had been allowed to continue by Unionists and Provisional IRA alike?
In the Republic the rise of Sinn Fein from the ashes of the Provisional IRA - a party that at one time wished to overthrow the Republic and its constitution and government system and put in place a Marxist workers' paradise (maybe it still does) - has been looked askance at.
It is possible to argue that the Provos lost the confidence of those they claimed to represent because in making NI an unworkable political entity they also contributed to making it a place that was unliveable (by drawing the presence of very heavy handed security forces to maintain order). I do not give the Provos any credit for the current tense peace in NI. I do credit the peace seeking majority on both sides of the border, both unionist and nationalist.