Russia was not the aggressor in all the three incidents. Check these:
1. Georgia/South Ossetia: Russia send its troops after the Georgians shelled the Russian peacekeepers and killed dozens of them without any provocation in South Ossetia.
2. Ukraine: Nuland and her cronies overthrew a democratically elected government after spending more than $5 billion. Nuland installed a neo-Nazi regime, and Russia stepped in to protect ethnic Russians.
3. Syria: The NATO started the war by arming and funding terrorist factions such as the ISIS and Al Nusra. Russia stepped in to help the democratically elected government.