Anyone who knows Eoghan Harris would know that the idea that he would remain removed from Twitter and what passes for political debate on the site would be something close to a physical impossibility. His life has been defined by an eagerness to cross the road to engage in an argument and not to walk the other way. His life, too, has been defined by what he believes is the most just and righteous fight in contemporary Ireland, against Sinn Fein and the IRA . “It’s my life,” as he said to Sarah McInerney on RTE on Friday. But anyone…