This is from Amnesty International's report on the death sentence handed down to a senior cleric from Qatif, in Saudi Arabia's eastern, oil-rich and largely Shia region. 

A death sentence passed today against a dissident Shi’a Muslim cleric in Saudi Arabia for “disobeying the ruler”, “inciting sectarian strife” and “encouraging, leading and participating in demonstrations” after a deeply flawed trial is appalling and must be immediately quashed, said Amnesty International.

“The death sentence against Sheikh Nimr Baqir al-Nimr is part of a campaign by the authorities in Saudi Arabia to crush all dissent, including those defending the rights of the Kingdom’s Shi’a Muslim community,” said Said Boumedouha, Deputy Director of Amnesty International’s Middle East and North Africa Programme.

Here is a short video clip  of Sheikh Nimr, arguing for justice rather than sectarian loyalty: "You're Shia; don't oppress Sunnis. You are oppressed. If you oppress anyone, even Sunnis, Allah doesn't love you. […] The oppressed should gather together against the oppressors. El Khalifa [the ruling family in Bahrain] are oppressors, but Sunnis are not responsible for them. El Assad is an oppressor, but Shias are not responsible for him. The oppressed cannot defend oppressors."

The sheikh supported the protests that have been ongoing in the Eastern province for several years. The prosecutor in his case has asked that he be crucified. From the BBC:

Officials said he rammed a security forces vehicle, leading to a gun battle. However, his family disputed the allegation that he resisted arrest and insisted that he did not own a weapon.

The cleric was held for eight months before being charged and reportedly spent the first four in an isolation cell at a prison hospital in Riyadh.

Activists and relatives say Sheikh Nimr, who has a wide following among Shia in Eastern Province and other states, supported only peaceful protests and eschewed all violent opposition to the government.

In 2011, he told the BBC that he supported "the roar of the word against authorities rather than weapons... the weapon of the word is stronger than bullets, because authorities will profit from a battle of weapons".

His arrest prompted days of protests in which three people were killed.

Human Rights Watch said more than 1,040 people had been arrested at Shia protests between February 2011 and August 2014. At least 240 are still believed to be in detention.