1) the Democrats agreed to the GOP's spending levels months ago. The GOP went back on their deal.
2) The GOP did nothing but demonize.
3) Congress is not exempt. They must participate in the exchange.
4) There actually is a good reason the individual mandate shouldn't be delayed: the mandate is a core provision to help offset the cost of all those people with pre-existing conditions signing up for insurance. Delaying it without also re-dumping everyone with a pre-existing condition would endanger the insurance industry.