Liberal MP Anthony Housefather appointed as new antisemitism adviser / Montreal Liberal MP Anthony Housefather named to new antisemitism adviser role / MP Anthony Housefather denounces poster telling him to 'get out of Canada' / Montreal MP Anthony Housefather chooses to stay in Liberal caucus despite anger over motion / Montreal MP Anthony Housefather to remain in Liberal caucus despite anger over motion / MP Anthony Housefather to stay on with Liberals after period of 'serious reflection' / Would Mount Royal constituents support Anthony Housefather crossing the floor? / Anthony Housefather 'reflecting' on future with Liberals after Middle East motion