I would consider an impeachment, but you are citing all the wrong reasons. Yes, Bush's policies may disagree with you, but you cant impach someone just based on that. What he would be impeached for, and the only thing he could be impeached for, would be lying to congress and the public about Iraq's WMD capabilities and other information that led us into the Iraq war.
Bush may not have served in the military, but to be honest, few US presidents have ever seen military action. And stem cell research does kill the blastocyst, which contains all of the cells that develop into an embryo, so in essence, it does destroy potential human life. It really depends on what you see as 'life' however, and based on what I've seen, learned and believe, I'm think the benefits outweigh any costs associated with the research. But thats just me. I'm not the president.