Murder and revenge are the long standing problems. Indoctrinating successive generations to hate each other only procreates violence and destruction. Weapons are not really the problem, it is the will not to use them first that is lacking. Courage in surrendering weapons shows good faith and willingness to try peacefull coexistance.
Without that show of commitment only the extremists rule. So far we see some IRA willingness to do this, but a one sided show will not satisfy anyone. Weapons can be replaced, so can the will to use them Loyalists must disarm too to show commitment to this peace initiative or it will surely fail....