You reduce racism and anti-Semitism by understanding it's history, cause, impact and effects, and yes, by creating a safe and open dialogue with victims. By developing a fast, robust, independent complaints and investigation system that applies consistent standards and enforcement.
By avoiding the partisan politicisation that led to party factions using the very real pain and fear of Jewish members as a weapon to wield and another faction that downplayed their suffering by denying all of the legitimacy of their claims.
Clearly the swift removal of members engaging in anti-Semitism alone isn't sufficient, that's why the report rightly criticised LOTO involvement in the complaints handling process (most of the intervention was to resolve complaints by suspending and banning members).