There are many different ways to solve problems in CSS, and those problems include things such as how you organise your CSS as well as how you make a two column

There are many different ways to solve problems in CSS, and those problems include things such as how you organise your CSS as well as how you make a two column layout. A lot of the time, it isn't hard and fast what the "best" way to do things is. What's important is that you realise everyone has reasons for doing things how they do, and that they are trying to solve particular problems with their approach. If you don't have the same problems, or solve them in different ways, you may disagree with their approach or even find it nonsensical. Of course, this shouldn't be used as justification for remaining entrenched, you should always try to understand where people are coming from and see if you could learn something.