“Pretending there was peace is not the same thing as actual peace.”
But there WAS peace vis-a-vis Russia. Russia broke that peace in 2014 when it invaded Ukraine and fostered the attempted secessions of the self-declared LPR and DPR.
“Ethnic Russians were getting shelled by Ukraine 50 miles from the border for eight years.”
They started a civil war. Both sides in the civil war attacked the other for eight years.
“Can you imagine if a large American expat community was under artillery fire in Ciudad Juarez?”
False analogy. Expats LEAVE their home country for another country and renounce any allegiance to their home country. No such condition existed in eastern Ukraine.
“The United States threatened war with Mexico when two American tourists were shot by Mexican drug runners.”
Cite your source for that, with a link or an attribution.