ShepherdsDog ShepherdsDog:
Lebanon, historically, was a fairly tolerant place. Even during the Civil War you had Christian factions siding with Muslim factions against other Christians and vice versa. Mixed marriages and families aren't that uncommon.
Mix marriages are not uncommon in Islam, what is uncommon is a non Muslim husband and a Muslim wife since that is forbidden. The rule is that Muslim men may take non Muslim wives, but Muslim women are never aloud to have a non Muslim husband.