Are you really bashing the author for imperfect English? The about page clearly mentions that they are not a native speaker of the language, and even apologises for any imperfections in their writing as a result thereof [1].
I strongly agree with your parent comment that attacking the author for presenting their strong views in an area is unnecessary. Make arguments against what they wrote, not who they are.
A little kindness also goes a long way. What the hell is this obsession with hammering everyone down with unwarranted negativity on this forum.