Saudi Arabia shouldn't be considered an ally. I'd argue there the primary reason for Islamism across the globe. They preach Wahhabism and spread there message via zakat or charity, setting up mosques and globes in non Muslim countries.

These imams and preachers preach hatred of infidels very openly. This form of Salafism is one of the most intolerant strains of Islam and is incubating Islamists and Jihadists by brainwashing them from birth. Not only do they kill gays, apostates, atheists, blasphemers and stone adulterers, they pass such morals on to the next generation and poison the minds of children. They do it because it consolidates there power, everyone else has to pay the price.