One thing I cannot stand that is so prevalent in the computer industry is criticism by people of ideas, products, and technologies that they don’t understand. You see this a lot in the OS wars–especially of Windows, but Linux and Apple are not immune.
In very few cases do people have a well-reasoned and thought out explanation for their feelings. People who bash other ideas for their “religious” reasons are not intelligent–they are freaks who should not be trusted to make good decisions about technology.
Sure, there are horribly bad products out there, but those are mostly ignored and quickly die off. Religious wars start over successful products. A little study and research into the reasons for various design decisions would go a lot towards increasing the intelligence of most of these people.