By John Salak -   Covid, insurrections, inflation, geopolitical turmoil, rabid (and tiresome) bipartisan politics, supply chain troubles and the Mets taking forever to hire a general manager—thank goodness the 2021 holidays are at hand. Finally, a chance to sit back with family and friends, emotionally detox and, for those so inclined, the opportunity to bask in the glow of a Christmas tree (real or artificial) that’s ladened with heirloom ornaments.   And that’s a lot of glowing considering about 100 million homes display trees each year and 60 million real and artificial trees are sold annually in the U.S.  Oh, you may want to check that thought. Just when everyone suspected 2021 couldn’t get any worse,…