"You're treading a dangerous line Lawson." He warned when Craig mentioned serving a halfblood. "He might be the son of a dirty muggle but the Dark Lord is more powerful than you'll ever know. No one knew what he was, and that didn't seem to matter much during the first two wars - he killed plenty of people despite his dirty blood." Jacob wouldn't continue to give his life to that man, but he wouldn't deny halfblood or not the Dark Lord was not someone to trifle with.
"Most who still serve him lack the sanity necessary to realize who and what he is - and those that don't, would rather sit at the right hand of the Dark Lord at the end of the world than in his path." He shook his head. "So do not speak to me about any of this being easy, when you know nothing about it."
He snorted, leave it to Craig to finish on something so petty. "You my friend have the wrong idea about manners." He told him shaking his head. "Manners are helping where you're obviously needed."