By Luke Baker JERUSALEM (Reuters) - Israeli police on Thursday shot dead a 32-year-old Palestinian man suspected of having tried hours earlier to kill a far-right Jewish activist, leading to fierce Clashes in East Jerusalem and fears of a new Palestinian uprising. The Al-Aqsa compound, or Temple Mount, which is a central cause of the latest violence, was closed to all visitors as a security precaution. It was the first full closure of the site, venerated by both Jews and Muslims, in 14 years Palestinian President Mahmoud Abbas de**unced Israeli actions as "tantamount to a declaration of war". ...