Putin's invasion of Ukraine is wrong. See? Its easy to say if you're honestly supporting Ukraine.
What Russia is doing on its border today is no different than what the United States has done throughout our own hemisphere since 1823 - preventing hostile foreign alliances within our defensive sphere. By enforcing the Monroe Doctrine, we have invaded many of the countries in our hemisphere at least once in the last 199 years.
Russian troops would not be in Ukraine today if the United States had not engineered the 2014 coup against Ukraine's democratically elected government in 2014 and spent the next 8 years building an anti-Russian government with a NATO-trained military. NATO's intentions in Ukraine were made clear at the close of its Bucharest Summit on April 3, 2008 when NATO declared its intention to expand its anti-Russian treaty alliance into Georgia and Ukraine. Russia will not permit an existential threat on its border, and is fighting now to avoid a much larger and more desperate war later.
Moscow is not acting alone in this action, as a third of the troops fighting alongside Russian forces are Ukrainian citizens of the Donestk and Lugansk oblasts who want to be free from the Kiev government that has opressed them and even banned them from speaking their native Russian language.