The affects from cosmic rays are not the primary climate change driver. Not all condensation is caused by cosmic rays. And the cosmic ray effect itself is perhaps one in a series of amplifiers that modify solar emissions changes before they enter the Earth's atmosphere. For example, the AGW proponents have stated that visible light does not change enough to cause significant affect on our climate. Well, we now how discovered one amplification mechanism. So less visible light combined with more clouds equals significant climate changes.
Visible light was always just a part of the spectral picture. There is also infrared and UV light. Without an atmosphere the UV light emission from the sun would destroy all life on this planet just by itself. And NASA has shown significant changes in UV light emission during changes in solar activity. Of course you could not get anyone from NASA or the Ozone Hole crowd to even consider such possibilities 15 years ago.
oops - changes before they - should read - changes as they