some of the things that i want to say here will not differentiate from the other comments in this thread, though as a russian citizen and cprf member i hope that it will offer some insight for western readers.

i do not support the current administrations internal actions, as capitalism has brought nothing but injustice, suffering, poverty, crime and corruption. but i absolutely do support its foreign policy, especially regarding the ukrainian question. the putin government has evolved to become one of the most effective anti-imperialist forces on the planet and even if you ignore the terrible nature of the terrorist zelensky-regime one has to be grateful to our military for fighting the biggest enemy of mankind, america.

so lets detail the happenings that led to the current situation:

(it may be important to note that the current russian administration pushes a slightly different narrative due to sadly being a right wing state)

banderite collaborators parading in front of nazi officers

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• the banderites (see picture), members of the fascist "organization of ukrainian nationalists" led by stepan andreyevich bandera were a gang of rapists and murderers who collaborated with the invading german hordes and assisted them by conducting acts of terror against civilians. It is important to note that popular support for them was close to zero.
• after the victory of the heroic red army, the majority of those parasites fled to the west, predominantly to canada. they received funding from american and british intelligence agencies, which were more than happy to welcome "former" nazis into their own anti-communist ranks.
• another subset of the banderites remained in the ukrainian ssr and conducted a campaign of terror and sabotage against the civilian population. their bloody deeds were supported by the cia and its european puppet agencies through the so called "operation aerodynamic".

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referendum on the preservation of the ussr. its results were ignored by the anti-communists

• After the illegal and undemocratic dissolution of the ussr, the leaders of those fascist gangs were glorified by the ukrainian far-right, with support from the cia. efforts to further their "rehabilitation" were primarily directed by nazi expatriates in canada. outlets such as voice of america portrayed them as "heroes".

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results of the 2004 presidential election before cia intervention. this division between neonazi northwest and pro-russian southeast is visible to this day

• in 2004, the west sabotaged the ukrainian presidential elections and installed their puppet, viktor andreyevich yushchenko, through a color revolution. he was a terrible leader, not only dismantling the remaining aspects of the ukrainian economy and managing to make life even more miserable than it already was, but also granting "hero of ukraine" status to banderite leaders and holocaust perpetrators stepan bandera and roman iosifovich shukhevich.

ukrainian neonazis in 2014

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• in 2014, america and the west orchestrated another coup, this time not even bothering to hide the involvement of neo-nazis. the new regime perpetrated unspeakable atrocities against the russian population, whom it consideres "subhuman," as well as against ukrainian anti-fascists. in odessa alone, 39 people were burned alive in the local trade union building.
• those developments led to the revolution in the predominantly russian populated donbass-area and the creation off the donetsk and lugansk peoples republics, as well as the referendum in crimea that led to the peninsula finally rejoining russia. from 2014 till 2022 the majority of humanitarian aid to the donbass republics came from the cprf.
• the reason for the smo is the ukrainian western-aligned nazi regime violating the minsk accords by refusing to demilitarize, trying to join the fascist nato-block and murdering russian civilians for years on end. the russian government showed itself extremely lenient, to lenient even, as any sensible politician would have staged a military intervention much earlier. if you need further proof for the tyrannical nature of the kievan regime just look at the fact that zelenskiy has banned all opposition parties in his country, refuses to hold elections and effectively rules as a military dictator. furthermore he has outlawed the russian language, made any negotiation with the russian state illegal and is currently selling whatever is left of his country to the highest bidder.

combine all this with the fact that the west and its puppets need to always be opposed due to them being a cancer of humanity and youll get a pretty good picture of why to support the russian military.