Our dignity has been pawned away, and if it is not ... restored, we will call for secession. Our dignity is more precious than the unity of this land.However, he also explicitly rejected violence. From wikipedia:
The [Saudi] authorities depend on bullets ... and killing and imprisonment. We must depend on the roar of the word, on the words of justice. We do not accept [the use of firearms]. This is not our practice. We will lose it. It is not in our favour. This is our approach [use of words]. We welcome those who follow such [an] attitude. Nonetheless, we cannot enforce our methodology on those who want to pursue different approaches [and] do not commit to ours. The weapon of the word is stronger than the power of lead.The Saudis arrest Sheikh Nimr in 2012, and he was tried and sentenced to death in 2014.
The response to Sheikh Nimr's execution has been protests across the Shiite world, especially in Bahrain. The Iranian foreign minister said,
It is clear that this barren and irresponsible policy will have consequences for those endorsing it and the Saudi government will have to pay for pursuing this policy.But when a mob attacked the Saudi embassy in Tehran, the police moved in and made many arrests. So Iran doesn't seem interested in escalating the conflict at this time.
I find this very discouraging. The Saudis not only believe that the real defining conflict of their time is a Sunni-Shiite struggle for power in the Middle East, they are working hard to make that struggle real.
Sometimes I think we have the wrong friends in the Middle East. The government of Iran is nasty and thuggish in many ways, but it is more democratic than those of our Arab allies.