He voted against funding of Stem Cell Research, while President Obama supports it.
He supports water-boarding, while President Obama says it is illegal, and denounces it.
He refused to endorse the Kyoto Agreement, which is an international agreement linked to the United Nations framework Convention on Climate Change. The major feature of the Kyoto Protocol is that it sets binding target for 37 industrialized countries and the European community for reducing greenhouse gas (GHG) emissions. These amount to an average of five per cent against 1990 levels over the five-year period of 2008-2012.
George W. wanted to build a wall to seal the border with Mexico to put an end to illegal immigration. Granted, illegal immigration is still rampant today, but to put up a wall accross the entire southern border of the United States with Mexico, would indicate that the United States just wants to totally isolate from the Southern country of Mexico. If such a wall should exist, then the U.S. Citizens should be barred from entering Mexico just like the Mexicans would be barred from entering the U.S.
He ignored his own secret service and FBI on reports of terrorism that may develop in the United States, mainly terrorists to attack the U.S. within it's own cities. This culminated in the attack of the World Trade Centers in New York City, the deaths of thousands of Americans at the Trade Center, deaths at the Pentigon, and a plane crash in Pennsylvania, to his outward deliberate attack of Iraq and Afganistan to show that he could eliminate terrorism. He not only did not eliminate terrorism, his Army committed prosecutable acts of torture which he claims he did not know about, to thousands of Americans who lost their lives to fight his war. The two wars still active today are now responsible for hundreds of thousands of civilian lives lost just because President Bush decided to commit his own acts of terrorism in other countries. But to him, that is ok for him to act as a terrorist just as long as he doesn't practice it in the United States.
In a sense, he is no better and just as guilty as Osama bin Laden.