Europe & Japan are looking at climate change over decades while Americans can only see "This is the coolest July evar. Where is your global warming now?"
Americans want to reject global warming so they can continue living the wasteful, polluting lifestyle they're used to.
EDIT: I'm going to make this as blunt and simple as I can: You can't look at a small time period (i.e. this July) and decide that because its cold, right now, the earth must be cooling. By that logic, when the heat waves hit Europe & N. America in 2006, global warming would be true. Thus, your logic is flawed.