While it was definitely engineered by Russia doing things to violate the sovereignty of Ukraine
1) The US and all the powerful nations around the world do this kind of crap all the time and have a long history of it
2) It appears as though the people living in Crimea generally prefer being Russian to being Ukrainian, at least there doesn't seem to be any major opposition to the change.
3) Crimea was only part of Ukraine from 1992 to 2014, before that it was it's own entity under the umbrella of Russian empire or the USSR for hundreds of years
I'm not pro-Russia but I am pro-reality, and this sanctions game seems to be about highschool-level-bullshit between world leaders and nothing else. It certainly has made politicians on both sides much more popular with their bases as a result. Having "enemies" does that rallying well.
If you want to sanction Russia, do it over corruption, election meddling, or human rights abuses (although maybe put a higher priority on your own country's faults along those lines first so you have a platform to stand on)
I'm here feeling like Fangorn "I am not altogether on anybody's side, because nobody is altogether on my side"