There are examples to show that the government acts to moderate the wishes of the population at large. In case of a democracy, the religious mindset of the people would translate into policies that would destabilize the region... further.
We saw this in the election of Muslim brotherhood in Egypt, Saudi nationals(not the government) funding extremist terror groups, and in Kuwait there are bills in Parliament that aim to establish shariah based punishments. The bill being eventually blocked by the amir.
The empty anti-Israel rhetoric from the Saudi government would likely be acted upon in a democratic state, perhaps along the lines of what we see in Iran.
Should foreign governments push for enfranchisement of the citizens of Saudi Arabia as their basic human right, considering the possible implications of doing so?
What is the stance of policy makers in the west in this regard?