OTTAWA — Quebec’s secularism law is an unjust attack on religious Quebecers and the Supreme Court could “reverse or enhance” the Charter’s notwithstanding cause to prevent that, opponents of the legislation argued Monday. On the first of four days of hearings over Bill 21, six groups opposing the province’s secularism law told the Supreme Court of Canada (SCC) that it violated a litany of Charter rights, including religious and language freedoms, multiculturalism and gender equality. They also argued that the province’s invocation of the Charter’s notwithstanding clause was not...