Do you not realize how fanatical you sound? Have you somehow confused economics with religion?
Or are you just void of reason?
Because your use of absolute terms really comes off that way.
If you would take a breath, realize you don't really have some inside look, and may just may have not realized what has been happening in the economy over the last 80 years to the extent you believe you do. You may realize that both have had their successes and failures.
Again, like I had said, at full employment, both classical and keynes models match up. But at times where unemployment gets above 6%ish the models start to move apart. Because the classical model assumes full employment, while keynes did not.
I actually like the classical model for more micro research, and do understand why they have the assumption of full employment. But in the real world, unemployment is not just a mechanism of choice. So that is when Keynes comes in handy.
Also if you realized Friedman was a genius, you should also know that for a lot of his career he followed the Keynesian system, so it couldn't be that bad right? And as he worked on his monetary and consumption theories, he developed new things, and tried to fill in some holes that were in both models.
See that is how sciences work, you know this. Economics is still pretty darn new compared to other sciences, and there is still a lot of work to do. But still it is pretty darn accurate.
And without any really accurate way to measure or track all this, the best models will fall apart, because the data is corrupted and it is not going to fit perfectly.
So when you say one is bad, one is good, maybe you should think about how much you actually know, and how much your basing your ideology on faith.
Because they both have been very successful over the years. Keynes is more of a stable slow growth, very light recessions, that is more easily manageable. And since Reagan the neo-classical model has been huge bursts of growth, followed by little deeper recessions that is far less manageable. Add to it every republican since has somehow had a huge recession every term of their presidency it adds up to them doing something wrong.
They both keep everything pointed in the right direction, I just prefer more stability and less risk. If you are determined to believe that we don't have control over our economic destiny, well then keep up with your bible studies.