Public broadcasters in Spain, Ireland and Slovenia have said they would not air the 70th anniversary Eurovision Song Contest, which begins on Tuesday in Austria and will culminate in Saturday’s grand finale, citing opposition to Israel’s participation. The three countries, along with the Netherlands and Iceland, withdrew on Monday from this year’s event in Vienna, leaving the contest facing the biggest boycott in its 70-year history. Vienna police have said they expect disruptive protests and possible attempts to block the event, particularly on the last day. Authorities said a pro-Palestinian demonstration involving around 3,000 people has been registered for May 16. Earlier this year, the broadcasters urged contest organizers at the European Broadcasting Union (EBU) to bar Israel over alleged vote-rigging and the war in Gaza. The EBU said Israel met the contest’s eligibility requirements and would remain in this year’s competition.…