If there's anything that both conservatives and liberals hate, it's political opportunists like Crist.
Not so. The Left will utilize him as the useful idiot that he is. When he is no longer useful, the Left will discard him. As such, Crist must work diligently to remain useful to the Left. He can do this by attacking Repubs on all fronts and with great energy.
Once his bolt is shot, he will no longer be useful, and he will be discarded by the Left into the ash-heap of history.