An Islamic cleric who mocked the convict ancestry of many white Australians is an embarrassment to the countryÂ’s Muslims, Prime Minister John Howard said on Sunday. The controversial Mufti of Australia, Sheikh Taj Aldin al-Hilali, last week suggested that Muslims had a greater claim to the country than the descendants of the British settlers. Howard said it was up to AustraliaÂ’s Muslim community to challenge al-Hilali, who is the countryÂ’s top Muslim cleric.