Your assertion that Russia can attack the whole world is tantamount to saying that the US or Australia can do it!
Ukraine, having decided to join nato, started to pose an existential threat to russia. Russia could not let that happen. This was the main condition of Ukrainian sovereignty - neutrality and non-aligned status.
When Ukraine violated it, it received the natural consequences of its shortsightedness!
If Mexico had agreed to deploy Russian weapons near US borders, America would have done exactly the same thing as Russia, but with a more brutal scenario! Why do you think that Russia should have allowed the enemy to approach its territory with its bases and weapons and America should not? There have been far worse crimes against civilians in US history than in Russian history!

Why aren't you worried about the people of Gaza? Unlike the Ukrainians, they are being destroyed for real! And here we have nightclubs, corruption in the country on humanitarian aid, arms trade from Western partners, evasion of forced mobilisation.... Transport and enterprises are working, the transit of aggressive gas through our territory to our partners continues ... Standing bridges, government, railway not shelled.
How many Gazans can tell us in the Hive about their fate? Why don't they come out in their pants dipped in paint to rally against aggressive Israel? They must have dignity!