GenZedong

amassment of troops can be a show of force and more often than not doesn't lead to an invasion

Yes but in this case there was a clearly stated intent from the Ukrainian side. As early as 2019 Zelensky publicly said that he would go to war to resolve the Donbass situation. I believe this is in one of the links i provided in the comments on the posts i mentioned earlier.

This was something that the Kiev regime, its spokespeople and all the Ukrainian nationalists were constantly talking about. Since they started their so-called "Anti-Terrorist Operation" in 2014 their stated goal was always to militarily subdue the rebels. The term "subhuman" was and is frequently used by them to refer to the ethnic Russians in the Donbass.

The only other option of resolving the situation would have been the Minsk agreements, but by 2021 the Ukrainian side was declaring them dead and was effectively saying they would never abide by them. NATO didn't spend 8 years training and building up a new army for Ukraine for nothing.

Either way it was not a risk that Russia was prepared to take, due to the reasons i laid out.

Do you have a link directly to OSCE report?

You can use Yandex to search for OSCE report Donbass shelling 2022. There have been a number of articles written about this in the alternative media space as well as of course the Russian media that reference this.

I'd like to know who he is and what the context was cause most likely he was calling to kill separatists, not just ethnic Russians.

This is not just something one guy was saying, this was and is a common talking point in the Ukrainan post-Maidan media and among Ukrainian nationalists. Zelensky himself was saying at one point that anyone who "feels Russian" should leave and go to Russia. This is also linked in one of the comments i made.

All this needs to be understood in the broader context of the anti-Russian laws that were being passed in post-Maidan Ukraine, as well as the atrocities that were being committed against anti-Maidan protestors and pro-Russian activists such as the Odessa Massacre.

I'm sorry i can't look up the exact links right now, but they should be in one of my comments addressing this issue.

Edit: here is the OSCE report: https://www.osce.org/special-monitoring-mission-to-ukraine/512683

And here is a Reuters article saying that shelling was noticeably escalating in Feb 2022: https://www.reuters.com/world/europe/osce-reports-surge-number-explosions-east-ukraine-2022-02-19/

(Reuters of course purposely omits and OSCE tries to obfuscate which side the majority of the shelling was coming from; but this can be seen when you look at maps of the registered impacts and how most of them were on the rebel controlled side)

More on who was responsible for the shelling here: https://www.moonofalabama.org/2022/02/ukraine-who-is-firing-at-whom-and-who-is-lying-about-it.html

Here an article that lays out the chronology and shows how the shelling was clearly increasing in the lead-up to the SMO: https://covertactionmagazine.com/2022/04/09/the-united-states-and-ukraine-started-the-war-not-russia/

And here another article laying out the argument why it wasn't Russia that started the war (the website it was originally published on is reactionary but the article itself is solid): https://archive.org/details/setting-the-record-straight-on-ukraine

Here is a statement by the Russian MOD claiming to have documents showing Kiev was preparing to invade the Donbass republics: https://www.sott.net/article/465263-The-Russian-Ministry-of-Defene-Original-documents-show-Kiev-planned-offensive-operation-against-Donbass-in-March-of-this-year

Here DPR authorities allege that Ukrainian soldiers who surrendered confirmed that the attack was planned and imminent: https://tass.com/defense/1413035

LPR authorities said the same thing: https://sputnikglobe.com/20220315/kiev-was-preparing-full-scale-offensive-against-donbass-in-march-2022--lpr-head-1093898027.html

This preparation was already evident and being talked about months in advance: https://anna-news.info/kiev-is-ready-to-attack-donbass/

Essentially Kiev was planning a "final solution" for the Donbass, using primarily hardcore Nazi punisher units; Russia's SMO pre-empted them by four days: https://newcoldwar.org/kiev-was-planning-final-solution-operation-in-donbass-russian-ministry/

On the topic of the stated intent of ethnic cleansing: https://www.sott.net/article/292240-Ukraine-government-admits-to-targeting-civilians-in-Donbass-region

This is not just one random person, this is someone associated with the Ukrainian government and Ukrainian military units who clearly says that the task of the Interior Ministry for which they work is to "cleanse" the cities after the military takes them over

The Kiev regime straight up denies the existence of ethnic Russians in Ukraine, which itself can be taken as a statement of intent of ethnic cleansing: https://en.topwar.ru/229905-vice-premer-ukrainy-stefanishina-zajavila-ob-otsutstvii-v-strane-russkogo-nacmenshinstva.html

We are talking about seven million people just in the DPR and LPR who unambiguously identify as Russian and by now have Russian citizenship. What do you suppose would happen to them if Russian forces pulled out and allowed Ukrainian Nazi units to move in who have a history of treating ethnic Russians and "separatists" like this: https://21stcenturywire.com/2014/11/17/natos-nazis-ethnic-cleansing-their-opposition-in-east-ukraine/

This intent was already understood by Ukrainians in 2014, it's not something Russia came up with after the fact to justify its actions: https://www.globalresearch.ca/ethnic-and-cultural-cleansing-in-ukraine/5387539