You're (mostly) right pieeyed, Bush was Keynesian light and Obama is Keynesian max, but both are Keynesians who believe deficits for revenue negative (big government) programs are okay and that inflation is manageable.
We've had enough history now with the practical application of John Maynard Keynes' economic theories that we should be able to make a judgement. We know that politicians (from both sides) tend to incur debt (deficits) not only in crises (war, great national disasters) or wealth building (revenue enhancing) projects, but more often to finance entitlement and big government programs that are a net drain on the economy.
Unfortunately, the American public in general know almost nothing about economics, not even at a freshman econ 101 level, and buy into the political rhetoric/promises.
How many programs that are revenue negative have been successfully sold to the public as "an investment in our future"? You would think that anyone with the brains of a fence post would know that an "investment" is supposed to show a positive return, but apparently not.
Many conservatives DO understand the problems (ever heard the term RINO?) and still vote more or less along party lines. All too often we have been given the choice of voting to have a 1 gallon bucket or a 55 gal drum of spit poured over our heads (or of not voting at all).
I've often wondered what our country would look like if every citizen were required to vote in national elections, and every ballot was required to list "none of the above" as one of the choices.