I read her blog as well. Please point exactly to where she says "I block this user/IP address/netblock/AS #/etc. because of the ethnicity of the user".
It used to work directly and now it doesn't.
It works via foreign proxy/VPN, but I'll just stop visiting her site from now until she stops with her racism.
I bet money she doesn't block requests by such a wide filter if the origin is USA.