VAUGHAN, Ont. — Rival protesters faced off on Thursday outside a synagogue north of Toronto, where a touring Israeli real estate exhibition promoting land for purchase in the occupied West Bank was making its final Canadian stop. A York Regional Policeofficer with binocularsstood on the roof of the synagogue in the community of Thornhill, watching dozens of protesters below him who were waving Israeli flags on one side and Palestinian flags on the opposite side of the street. On the steps of the synagogue where the Great Israeli Real Estate Event was being hosted, demonstrators played pop music, danced and...