It's not what he said, he said:

But the expansion of Israel and its proxies is an absolute, fundamental necessity for the United States to have the steady leadership there.

Even assuming it really was brainfart, dude who make multiple such brainfarts in a single sentence, entirely changing the meaning of his speech shouldn't be even village post worker, not to mention Vice President of USA.

And considering what he said exactly fits and is consistent with both US decalrations and actions, this wasn't a brainfart, it was something much worse for them: a moment of sincerity.