Exactly. There was a turd used by Reid to manipulate, and also the pathway to citizenship that conservatives rejected. There were also other amendments that Dems offered that soured the soup. And it wasn't just conservatives that didn't support it, even some unions and LULAC went against it. The final cloture vote against included 16 Democrats, some of whom were against the bill because it would have meant W would have signed it and got the credit.
The reality is a little more complicated than what you've set forth.
Turd, as you say, or not, it was something that Republicans will never get again. You mentioned LULAC. They were upset over the possibility that it would pass and give Republicans everything they ever wanted. Dems who voted against cloture were either concerned about reelection or as with LULAC, couldn't believe Reid put something like that on the floor.
So once again, what was in the bill that conflicted with your earlier concerns? How much better off are we today, now that Obama has likely already essentially legalized about 5 million, regardless of their criminal history?