Islamists and Christians will disagree on this because they feel that 'their set of facts' is the one true set.

But the fact is: both of these positions have very poor support, which is why theology is not a branch of science. That a lot of people believe this and that those people can subvert democracy to give their 'alternative realities' preferential treatment is one of the major reasons most forms of government try hard to keep religion out of government. This usually doesn't succeed 100% but at least they recognize that there is something not ok about this.