Let's take these charges one at a time:
'Renditioning' people for torture: Renditioning is a practice that predates Bush and is most likely carried out by the CIA, definitely NOT a wing of the "Bush regime" (see Plamegate). Doesn't make it right, of course.
sexually abusing prisoners of war: Again, the Armed Forces are not a wing of the "Bush regime". And the prisoners at Abu Ghraib (I'm assuming this is what you're referring to) weren't POWs by defintion.
starting wars on false pretenses: (I'm guessing you're talking about WMD.) Making sure that Saddam isn't capable of developing nukes isn't a false pretense, regardless of whether or not he actually possessed that capability at the time of the invasion. Preventing the merest possibility of a future nuclear-armed Uday Hussein regime is worthwhile in and of itself, as is deposing a tyrants with Saddam's credentials in any case. And, to be technically correct, the action taken in 1991 was never fullly resolved, so Bush wasn't really "starting" a war with Iraq.
lying on the world stage: I'll give you this one. You can tell a politician is lying when his mouth moves. I challenge you to find me one example of a politician talking on the world stage who isn't lying. Start by crossing Kofi Annan, John Kerry and Jacques Chirac off the list.
undermining prohibitions against torture: You're going to have to flesh this one out a bit. Are you referring to renditioning again? Or are you suggesting that Bushco authorized domestic torture as well as farming out torture to foreign governments? Which definition of torture are you going by, the universally understood definiton that involves causing extreme physical pain and/or permanent disability, or the McCain definition that boils down to anything that causes discomfort or shame? Further, it's a pretty twisted outlook that views America's efforts to catch or kill people who saw other people's heads off for propaganda purposes as being part and parcel to "undermining prohibitions against torture". Prohibitions are meaningless if they are universally applicable.
I don't know why I bother with replying to this drecht. I honestly don't believe that you think America has been disgraced by Bush - to feel that way, you'd have to have seen some good in America at some point.