NEW : A rebel group says 123 people have died in the violence . Syrian opposition demands include release of political prisoners , freedom of speech . It 's the biggest crowd one activist has seen since protests started . Syria 's president appoints Ali Safar as prime minister .
NEW : A rights group says 123 people have died in the violence . Syrian opposition demands include release of political prisoners , freedom of expression . It 's the biggest crowd one activist has seen since protests started . Syria 's president appoints Adel Safar as prime minister .