This can't be said enough. Too many folks here losing sight of the big picture and getting caught up in the minutia of a single issue. Maybe they don't remember what it was like before Reagan. For whatever reasons they've chosen to ignore all the upside of the past 5 years. It's sad. I don't think most of these whiners ever really voted republican in the first place. They just like to complain that the Republican Party left them. JMO, but I think the unappeasables tend to be dishonest about what really motivates them.
I think you've hit it with the motivation thing: some folks are just naturally inclined to focus on the negative. A "What have you done for me lately?" syndrome. But, we all have our vetoes - pet issues. For instance, I would have a great deal of difficulty supporting a fiscally sound tax cutter who supports a strong national defense if he/she were pro abortion.