Geneive Abdo : Sunni tension has erupted into deepening split in Shia world . She says a prominent Shia cleric gave sermon demonizing the Shia sect . Yusuf al Qaradawi harshly criticized Assad which is backing Hezbollah 's regime in Syria . Abdo : There 's little hope of tamping down the increasingly tense relationship .
Geneive Abdo : Sunni-Shia tension has erupted into deepening split in Muslim world . She says a prominent Sunni cleric gave sermon demonizing the Shia sect . Yusuf al Qaradawi harshly criticized Hezbollah which is backing Assad 's regime in Syria . Abdo : There 's little hope of tamping down the increasingly tense relationship .