"It is very painful. As Muslims, we have faith in God but the picture is bleak, it's black," al-Nimr said.
Tumultuous 1st year for Saudi King Salman's 'decisive' reign →
He said Sunday that the cleric "neither invited people to take up arms nor hatched covert plots. The only thing he did was public criticism."
Saudis cut ties with Iran after embassy attack →