The Iranian government, for instance, considers the channel blatantly pro-US/pro-Israel and anti-Iran.
The Libyan, Egyptian, and Syrian governments, as well as both the Israelis and the Palestinian Authority, have all accused Al-Jazeera of being biased against them in the past.
As I don't understand Arabic, I can't claim to have watched Al Jazeera, but from the fact that governments all over the world don't like it, it seems plausible that they might just be a relatively fair news organization, which doesn't blindly support any government or political group.
You can't trust these A-rabs to tell the truth. Dubya understood as much:
Remember Eason Jordan, the CNN news chief who was forced to resign back in February because he dared to say, at a private conference, that the United States had killed about a dozen journalists in Iraq?
Well, he’s looking a lot better today, one day after the Daily Mirror reported that George W. Bush wanted to bomb Al-Jazeera headquarters in Doha, the capital city of Qatar. “He was talked out of it at a White House summit by Tony Blair,” the Daily Mirror said.
Al Jazeera's offices have previously been hit by United States weaponry. On 13 November 2001 a U.S. missile hit Al Jazeera's office in Kabul, Afghanistan, during the U.S. invasion of that country. Although no Al Jazeera staff were hurt in the attack, the building was destroyed and some employees' homes were damaged. At the time, Mohammed Jasim al-Ali, managing editor, said that the coordinates of the office were well known to everyone including the Americans.
When former British Home Secretary David Blunkett published his memoirs in late 2006, it was revealed he had advised Prime Minister Tony Blair in late March 2003 to bomb the Al Jazeera television transmitter in Baghdad. "There wasn't a worry from me because I believed that this was a war and in a war you wouldn't allow the broadcast to continue taking place", Blunkett said.
On 8 April 2003 a U.S. missile hit an electricity generator at Al Jazeera's office in Baghdad. The resulting fire killed reporter Tareq Ayyoub and wounded another staff member. On 24 February, Mohammed Jasim al-Ali had sent a letter with the coordinates of the offices to Victoria Clarke, the U.S. Assistant Secretary of Defense for Public Affairs (the location had not been officially requested by the U.S. government). This incident, which occurred during the U.S. assault on Baghdad and after criticism of Al Jazeera's coverage from those supportive of the war aims of the United States forces, gave rise to suspicions that the network had been targeted.
Frank Gaffney published an opinion piece on 29 September 2003 calling for Al Jazeera to be "taken down" "one way or another" because it constitutes "enemy media".