Raedwulf,
I read the article and, like meself above, I can't see what your problem is. It doesn't say that he was THE Czech but, rather, A Czech "who flew with a fury none of the others could match". This does not belittle the significant and heroic contributions made by others, both British and non-British.

The article goes on to acknowedge the role of both Poles and Czechoslovaks in the Battle of Britain.
"According to the Imperial War Museum, 145 Polish airmen fought in the Battle of Britain, 79 in various RAF squadrons, 32 in No. 302 (Polish) Fighter Squadron and 34 in No. 303 (Polish) Fighter Squadron
There were also two Czechoslovak fighter squadrons, 310 Squadron and 312 Squadron, both based at Duxford in Cambridgeshire for the duration of the Battle of Britain".

DC