Q: Without the acrimony of the annual UT-A&M football game, Thanksgiving family dinner has been relatively peaceful the past twelve years. Now that the rivalry is back, any suggestions for keeping the peace at our divided dinner table?Mark S. Browning, College StationA: The Texanist can think of few things that make him feel more exhilarated than a good old-fashioned, rancor-fueled college rivalry. And the matchup between Texas A&M and the University of Texas, which kicked off in 1894, may be the granddaddy of them all. The conflict has been quiet since the teams last clashed, in 2011, but many folks can recall a time when scant few Texans identified as anything other than an Aggie or a Longhorn. (Even those who didn’t attend either school!) Come…