Why don't anti-evolutionists understand evolution?

I sometimes wonder if certain Christians' objections to "Evilution" would be less if they understood even the basic idea of evolutionary theory. If someone goes to the trouble of producing a YouTube video claiming that evolution is a fairy tale because the theory claims that an animal evolved in a particular way for a particular reason, it's a good idea to know what evolutionary theory actually states.

http://youtu.be/p_Kgv_iJ8hA


In this video much scorn is poured on the reason given for the evolution of the giraffe's long neck. But anyone with even the slightest acquaintance with the process known as "Darwinian evolution by random mutation and natural selection" will be aware that the giraffe's neck did not get longer by stretching. So this video misses its target completely.

The video's producer is in need of some fairly basic education regarding evolutionary theory, and usually there's no shortage of commentary in that vein. But in this case comments are disabled. Why is that, I wonder?