How much of your worldview do you have to keep to yourself living in Egypt?
With the vast majority of people, almost all of the significant aspects of it. Even sharing my lack of belief in free will would be taboo considering that it would be conspicuously against a core belief in the two main religions in Egypt (Islam and Christianity). And of course, support for LGBT rights is also a major taboo, although both that and support for gender equality have been gaining more traction in the last several years. The internet has undoubtedly played a part in this due to the increasing exposure to information and other cultures.
I have made a smaller social circle with whom I can freely be myself. It's still hard for us in the larger society, but that usually serves as a strong incentive to form bonds and stick together more closely, if anything.
I can share my love for cats quite freely with everyone, though. I guess that's something!