MEXICO CITY — A new museum is bringing the lessons of the Holocaust and its grim cousins to new generations of Mexicans — and reminding them that the intolerance that feeds genocide can even grow close to home.The five-story glass and concrete building inaugurated Monday beside Mexico’s Foreign Relations Department takes visitors through chilling displays on the Nazi Holocaust and how it was seen from Mexico, then continues through other horrors, including the slaughters of Armenians, Tutsis and Sudanese.It moves toward the very borders of Mexico as well: the 36-year civil war in neighboring Guatemala, where government forces exterminated scores of Mayan Indian villages during a bloodbath that cost some 200,000 lives and drove thousands of refugees into Mexico.”It’s important as a nation to be very vigilant about any act of exclusion,” said President Felipe Calderon during the inauguration. “We have not overcome discrimination, which affects many groups of society — indigenous people, women, children, people with disabilities and migrants.”