Dershowitz on torture

In which I read Alan Dershowitz so you don't have to:

Although I am personally opposed to the use of torture... many decent members of the French Resistance ... under Nazi torture, disclosed the locations of their closest friends and relatives.... In several cases involving actions at least as severe as waterboarding, courts have found no violations of due process.... What is needed is a recognition that government officials must strike an appropriate balance between the security of America and the rights of our enemies.

If this is opposition, what does advocacy look like?