I think the advantage of democracy is that it makes us less dependent on a group of leaders.
If you elect a religious party into power, you no longer have a democracy.
In 1940, President Roosevelt called on American industry to become the 'great arsenal of democracy.' Automotive manufacturers in Michigan responded and converted their assembly lines from cars to tanks and helped America win World War II.
Israel cannot be a democracy if it occupies land of other people.
Communism destroys democracy. Democracy can also destroy Communism.
If you want to preserve - I'm very serious now - if you want to preserve democracy as we know it, you have to have a free and many times adversarial press. And without it, I am afraid that we would lose so much of our individual liberties over time. That's how dictators get started.