Egyptian President Mohamed Morsi rejected on Thursday what he called Israel\'s aggression in Gaza, saying it threatens to destabilise the region. \"The Israelis must understand that we do not accept this aggression, which could lead to instability in the region,\" Morsi said in televised remarks, as Israeli air forces pummelled Gaza and militants fired rockets back in a deadly tit for tat. Egypt\'s Islamist administration, which has close ties with Gaza\'s ruling Hamas movement, recalled its ambassador on Wednesday in protest at the Israeli operation, which began with the targeted killing of a top Hamas military commander.