By Yael T. Abouhalkah, Kansas City Star Editorial Page columnist

Turns out Barack Obama can make mistakes, even in the eyes of his true believers on the Internet. Take his recent flip-flop on the federal surveillance law.

First, he opposed an updated Foreign Intelligence Surveillance Act (FISA) because it would give telecommunications companies such as Sprint immunity from lawsuits even if they helped President Bush's warrantless wiretapping program.

Good for Obama; the president's actions violated Americans' civil liberties.

But Obama now says he voted for the updated law this week to help protect the nation. He and his defenders say that its a good law, even with the immunity piece in there.

That position has angered a number of Obama's online backers who have used the Internet -- as he told them to do -- to collect supporters and cash for the candidate.

CNN reported that "the blog DailyKos.com called Obama's decisions to vote for the bill a 'sellout' and a 'tactical blunder.'

"And on 'getfisaright.com,' a self-described group of 23,000 Obama supporters has posted an open letter to the presumptive Democratic presidential nominee, saying that 'it is disheartening that you decided to support this bill, which does immense damage to the rule of law and our most fundamental democratic institutions.'"

Don't worry, Democrats. The liberal bloggers will get over their disappointment and wind up voting for Obama in November.

Of course, the candidate knew that all along, even when he was getting ready to do his flip-flop on FISA.