I observe however that their is an emergent definition of 'racism' which is quite a bit more broad than yours.
Basically it is this "Assuming specific or stereotypical attributes about an an individual or group, based on that individual or group's membership in a definable group."
This removes the typical restriction that it involve 'race specific traits' so things like 'Bankers are greedy criminals' or 'Christians are fascists' get reflected back as variations on the 'racist' meme. When ever that group membership nominally includes race it's considered racist by people who share that racial attribute.
Even the discussion we're having (and as an operations guy I see a lot of bad actors whose IPs originate in countries that were former parts of the USSR) we have to be careful to disentangle accusations of people of a region being bad, and regions which host infrastructure which is available to everyone, being used for bad. The Internet does many things and one of those things is create 'telecommuting criminals' who may easily be living in New Hampshire but hosting their C&C servers at a friendly ISP or EC2 equivalent in the Ukraine.
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I presume it is inherently and practically more difficult to investigate identity of someone renting servers in US vs Russia, Ukraine or China, in part because of language, legal system and political differences.
It's not racism to recognize these statistical facts. Racism is when we have prejudice based on them. It's when we slander an entire ethnic group or nation of origin based on the actions of a few of them. This is not justified just because there is more cybercrime in Russia than elsewhere: there is cybercrime everywhere, and the vast majority of Russians are not cybercriminals.
It's racism to say we "run the risk of russians" when we mean we run the risk of malevolant cybercriminals. The two terms are not interchangeable. We don't say you "run the risk of blacks" when we mean you might get mugged in downtown LA even if we believe that more muggings in downtown LA come from blacks than other ethnic groups, nor do we say you "run the risk of whites" when we mean you might get killed by a serial killer as you're walking to your car in an empty garage at night, even if we think perpetrators of such crimes are more likely white than anything else.
I think your examples are clear prejudice (and no, I wouldn't say them), but they may or may not be racism.
The UN's definition of racial descrimination:
"the term "racial discrimination" shall mean any distinction, exclusion, restriction, or preference based on race, colour, descent, or national or ethnic origin that has the purpose or effect of nullifying or impairing the recognition, enjoyment or exercise, on an equal footing, of human rights and fundamental freedoms in the political, economic, social, cultural or any other field of public life."
I don't know what the US legal definition is (though I'm guessing it's the similar) but in the UK discrimination based on country of origin would count as racism.
If it's based on the current social or economical situation of Russia, it's prejudice, but not racism. Remember that Russians are "citizens of Russia", not a particular ethnic group.