I see some tension between genealogy and patriotism, since genealogy is mainly about families.
And of course relatives have a way of crossing national lines and taking up arms with Tecumseh or Loyalists or Confederates or Viet Cong.
To the extent that genealogy is about the nation(s) ancestors lived in and fought for, no nation that I am aware of deserves uncritical admiration. Understanding and analysis and respect, yes. But not the kind of patriotism that led the DAR to blackball Jane Addams in the 1920s -- more like the kind that now includes her in their on-line hall of fame of "Dazzling Daughters."
The issue is difficult because genealogy also has roots in the desire to idolize our forebears and make their stories pretty prologues leading to the wonderful climax which is us. My great-great-grandfather's first cousin, Walter Thrall -- an Ohio probate judge and early genealogist -- seems to have taken this view. He wrote, “We should cherish with grateful recollection the memory of parents, and follow their good advice and example, forgetting their foibles and errors [emphasis added]” -- a viewpoint that does not sit well with the objectivity demanded by today's Genealogical Proof Standard.
Obviously this is a personal question to which everyone may have a different answer. What's yours?
Walter Thrall, ed. Edward G. Randall, Genealogy of the Thrall Family, also of the Rose Family, to the Year 1862 (Poultney, VT: Randall Brothers, 1890), 4; digital image, Ancestry.com (http://www.ancestry.com : accessed 3 July 2012).