Yes a determined effort at cutting off the weapons supply was a key factor and the eventual decommissioning of those already smuggled into the country was a prerequisite to confidence building and the eventual success of the peace processIf "stripping them of that right" was going to have any impact, then why don't we strip them of their right to commit murder in the first place?
Was the problem in the North of your country the result of them having the right to have the weapons they did? Was the solution arrived at by just banning their weapons?