1. Surely even you appreciate the difference between having some percentage of the population speaking a 2nd language vs having that language forced on you as an official language by a military oppressor. Or would you contend the fact that Spanish is spoken in the SW means Mexico has carte blanche to invade then insist on terms of its use?
2. Crimea's demography is irrelevant. The fact is the land - the property - legally belonged to Ukraine and was militarily taken by Russia.
3. What are you talking about? Austria is bordered by Germany, the Czech Republic, Slovakia, Hungary, Slovenia, Italy, Switzerland, and Liechtenstein. No mortal enemies. No countries that seek to remove it from an alliance with others.
4. Bucha was perpetrated by Russia.
https://www.ebsco.com/research-starters/military-history-and-science/bucha-massacre"While the Ukrainian government accused Russia of war crimes, Russian authorities denied the allegations, claiming that the killings occurred after their troops had left the city and labeling the reports as Western propaganda. However, satellite imagery has countered these claims, indicating that many of the killings took place during the occupation."
https://www.aljazeera.com/news/2022/4/4/will-the-bucha-massacre-wake-up-the-world"They were shelling all the time, around the clock, and all the shells flew over my house," Oleh Matsenko, who survived 33 days of Russian attacks in Bucha, a once-tranquil town northwest of Kyiv, told Al Jazeera.
Speaking four days after Russian troops retreated, he said he was particularly frightened when a column of dozens of tanks and armoured vehicles slowly drove by surrounded by infantrymen peeking into the doors and windows of the houses on his street.
"The column was so big that it took them about two hours to drive past my house," he said.
Going out for food was a gamble, he said.
Some of his neighbours left their dark, cold houses that had no electricity, running water or natural gas supply to get bread or charge their mobile phones but never came back.
One day, he went to a market that survived the shelling to get food for himself and several friends and neighbours who flocked to his house, which was warmed by a wooden stove.
And he saw bodies mostly civilians shot dead by Russian troops.
https://www.nytimes.com/2022/12/22/video/russia-ukraine-bucha-massacre-takeaways.htmlPresident Vladimir V. Putin *** claimed that the Russian Army had nothing to do with it.
But an eight-month
visual investigation by The New York Times concluded that the perpetrators of the massacre along Yablunska Street were Russian paratroopers from the 234th Air Assault Regiment led by Lt. Col. Artyom Gorodilov.
The evidence shows that the killings were part of a deliberate and systematic effort to ruthlessly secure a route to the capital, Kyiv.
https://www.ohchr.org/en/press-releases/2022/12/un-report-details-summary-executions-civilians-russian-troops-northernUN report details summary executions of civilians by Russian troops in northern Ukraine
As for your claims of no additional atrocities - as if that even proves Russia's innocence in Bucha:
https://en.wikipedia.org/wiki/List_of_massacres_in_Ukraine 
