How have courts interpreted the opposition clause of section 704(a) of the Ontario Human Rights Code?

In that case, the plaintiff's opposition to discriminatory practices was expressed by participation in a boycott and in picketing designed to convey a message to customers and the general public as well as the employer. Id. at 1135. The court held that when the plaintiff showed that he had not been rehired because of his participation in the boycott and picketing, he successfully demonstrated a prima facie case of discrimination prohibited by the opposition clause of section 704(a) under the McDonnell Douglas v. Green test. Id. at 1141.