Controversy over Israel's participation and boycotts unprecedented in scale are already weighing on the Eurovision Song Contest before it even kicks off in Vienna.

Controversy over Israel's participation and boycotts unprecedented in scale are already weighing on the Eurovision Song Contest before it even kicks off in Vienna.

The Eurovision song contest turns 70 this year, but the celebration threatens to be overshadowed by the competition’s biggest ever boycott over the continued inclusion of Israel.

Fans are grappling with how to react to the withdrawal of Spain, Ireland and others over Israel's participation.