A lot of “CSS is not real programming” arguments are a basic misunderstanding what CSS is there to achieve. If you want full control over and interface and strive for pixel perfection – don’t use it. If you want to build an interface for an inclusive and diverse web, CSS is a great tool.
Christian does a good job of describing the much-misunderstood declarative nature of CSS.
In any case, belittling people who write CSS and considering them not real developers is arrogant nonsense.