Lebanon’s objection is specifically due to Israel’s participation, according to Wikipedia:
> Lebanon has never participated in the Eurovision Song Contest. The country's broadcasting organisation, Télé Liban, was set to make the country's debut at the Eurovision Song Contest 2005 with the song "Quand tout s'enfuit" performed by Aline Lahoud, but withdrew due to Lebanese laws barring the broadcast of Israeli content.
> Lebanon has never participated in the Eurovision Song Contest. The country's broadcasting organisation, Télé Liban, was set to make the country's debut at the Eurovision Song Contest 2005 with the song "Quand tout s'enfuit" performed by Aline Lahoud, but withdrew due to Lebanese laws barring the broadcast of Israeli content.