Attacking a country's people because the government is a dictatorship makes no sense. Especially when we were just fine with the brutal dictatorship that preceded the one we hate, because that one was capital-friendly and didn't try to give white man's money to brown people.
I mean, if your argument is that sanctions never work and are useless, then that's a position that we can argue, but I guess that means you also would support lifting all sanctions against Russia, Iran, Afghanistan, etc?