Can you name a totalitarian regime which was toppled by our engaging them? The Soviet dissidents like Solzhenitsyn said that our trading with the USSR prolonged the agony of the Soviet people. Our trading with China has only turned it into a military power and trade empire, strengthening the Chicom regime. The South Koreans trade with DPRK, which continues in its Stalinist ways.
I'll have my doubts about the trading with the USSR. When we don't engage in trade, the dictators don't suffer, but the people do. Trade allows information to flow about the standard of living in other places. I have an number of issues with the other statements, but it would take a long time to write and I've got to go.