I do not think Bitcoin was created by any government.
There could be be two groups involved, which are on the suspects list for having provoke bitcoin,
of one of these is a group centers around the Trinity College, another is a bunch of loosely affiliated international collaborators.

Both of these groups are on the record with indicating to bitcoin with papers & software.
But both groupps haven't admitted so far openly that they were involved of creating bitcoin.

If you read the papers they published in the run-up to bitcoin then there is pretty clear that these two groups had the technical ability
and the means to execute that idea.