[BMCDA]

You don't have to use Saddam or Stalin as negative examples. If you go further back in time and regard European monarchies, you'll notice that they were also founded on Christ's teaching and that even officially, unlike the U.S.
They were officially recognized by the Christian churches (catholic, protestant and eastern orthodox) thus they really believed that it was the form of government that God wanted.

So it really seems that everyone tries to use the teachings of Christ (or any other god, prophet, etc.) to justify whatever he thinks is right.

[Tribune7]

If you go further back in time and regard European monarchies, you'll notice that they were also founded on Christ's teaching . . .

But they weren't founded on Christ's teachings. They used the Bible to justify maintaining their power -- divine right etc. -- but Europe's royal houses were founded on the acquistion of personal power.