The author of the submitted website is a native speaker of Dutch, but his English looks fine to me (a native speaker of English). I think his choice of emphasis, which I didn't try to reproduce when I submitted the website here on Hacker News, makes the point that people can become mere amateurs or even cranks[1] about theoretical physics unless they prepare carefully. I have seen a few examples of theoretical physics cranks[2] over the years.

[1] I mean "crank" in the second sense shown at the Merriam-Webster dictionary site.

http://www.merriam-webster.com/dictionary/crank

[2] http://blogs.scientificamerican.com/cross-check/in-physics-t...

http://scienceblogs.com/insolence/2012/01/10/a-profound-misu...