For proof, have a look at this article, provided by "A British Reader." It tells us that JB has revealed to the BBC that George Bush had zero interest in pursuing a cease fire during Israel's war with Lebanon last summer. What Bush (and presumably Bolton) wanted was for Israel to eliminate Hezbollah, first. To help this happen, Bolton says, the White House did everything it could to block and otherwise delay cease-fire diplomacy.
That's fine strategy, I suppose, but it's not something you want to blab to the BBC. I mean, how is any Arab nation supposed to feel good about the United States when a top diplomat cheerfully admits that Israel is a proxy, sent to do the White House's dirty work?