Experts and officials sound alarm over rise of extremist groups after march through Niagara park  CTV NewsLime Ridge Mall reopens Friday after unexpected closure  The SpecWhite nationalist rally in Niagara sparks warning over growing hate groups  CHCHNiagara rally by masked members of men’s ‘nationalist club’ raises fears of growing extremism  CBCOpinion | White nationalists are filling a void left by retreating progressives  The Spec