But what really astonishes me is the fact, that Russia has any problem with accepting such a point of view?
And that other nations are afraid of doing so - being aware, that this would spoil their relations with Russia.==
Your definition of genocide is so wide that the any revolution is ment to be called as the genocide.
For example: American Revolution of 1760th was “...any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such: ...” the ethnical group of British.
French Great Revolution of 1790th was “...any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such: ..” the social group of french nobles.
Any war is the genocide from the start.
For example: the latest Iraq war is “...any of the following acts committed with intent to destroy, in whole or in part, a national, ethnical, racial or religious group, as such: ..” the ethnical group of the Sunni Arabs.
So it means that Pole soldiers is committing the genocide of Sunni Arabs in Iraq just now. How do you like it?:)
And so so on. I may give you the hundred of such examples just because you include into your definition of genocide just any hostilities which one group may do to another. So any hostility are commited with intent to destroy. And if it concerns the big group of people then we can always to find the indications to name it the genocide.
But really the genocide is just the real extermination of one ethnical group by another. Over. Otherwises there are just the atrocities. The punishable crimes but not genocides.
According to your definition - the deeds of the Khmer Rouge of Cambodia, when they slaughtered 20-25% of the nation within 4 years were not genocide.
As tho the French Revolution - I have no doubts, that what the revolutionaries did to the noble men and those, who did not supported the revolution was a genocide (see for example the way how the Revolutionary government treated royalist, Catholic peasants in Vendee in 1793, which has been widely recognized, as the first modern example of genocide).
http://en.wikipedia.org/wiki/Revolt_in_the_Vend%C3%A9e#Claims_of_genocide
Same applies to Soviet Russia.