The IRA "connection" is what the usual trolls focus on as well as some of his verbal "critics" inside certain footie stadia. The full explanation is far more complex and indeed there are books written re the antics of the British state on NI and the consequent animosity within the nationalist communities and support for the IRA. McLean is indeed part of that "culture" where many people have "long memories" and a sense of injustice re many issues during the worst period of The Troubles.