The gathering was one of at least two in the Baltimore area on Sunday in the wake of the mass shooting at the Tree of Life Congregation. Speakers and participants at Sunday’s events sought solidarity and decried the fomenting of anti-Semitism at a moment when Maryland has experienced hate crimes on the rise: Reported incidents grew by 35 percent last year, to a pace of more than one report a day; after African-Americans, Jews were the second most frequent target of hate crimes in Maryland last year.