I guess you are pro-war. Peace is bad, and endless wars for the owner-class' profit are good.
USSR had a red line; once crossed, the pact is broken. US/NATO had an agreement with Russia.
We had red lines with Israel, but we still support them; we want WWIII, and it seems we keep getting closer to that being reality. Just looking at Israel killing a Hamas leader in Iranian territory, Iran's red line was crossed as well.
I can't blame you; I was also taught pro-US history classes; I had to learn from independent media and independent journalists to see non-status quo views.
The Molotov–Ribbentrop Pact, officially the Treaty of Non-Aggression between Germany and the Union of Soviet Socialist Republics, was a non-aggression pact between Nazi Germany and the Soviet Union with a secret protocol that partitioned between them or managed the sovereignty of the states in Central and Eastern Europe: Poland, Lithuania, Latvia, Estonia, Finland and Romania.