Not that they're Biased, Mind You

They are a Union which just looks after its own members.

From the Jerusalem Post :

Britain's National Union of Journalists denounced Israel on Friday for its "military adventures" in Gaza and Lebanon, called on the government to impose sanctions and urged a boycott of Israeli goods.

By a vote of 66 to 54, the annual delegate's meeting of Britain's largest trade union for journalists called for "a boycott of Israeli goods similar to those boycotts in the struggles against apartheid South Africa led by trade unions, and [for] the [Trades Union Congress] to demand sanctions be imposed on Israel by the British government."
...
The motion condemning Israel's "savage" behavior toward Palestinian civilians in the wake of "the defeat of its army" by Hizbullah passed by a wide margin.
...
On the same day the National Union of Journalists condemned Israel, the organization's international affiliate, the International Federation of Journalists, called on the Palestinian Authority to secure the release of BBC correspondent Alan Johnston, who was kidnapped five weeks ago by Palestinian gunmen in Gaza.

IFJ general-secretary Aidan White urged the "Palestinian government to do everything in its power to make sure [Johnston] is released immediately."

The kidnapping had done "great harm not just to journalism but to the development of the region in general by making it impossible for journalists to work safely and report on developments there," he said.

Johnston's kidnapping was not on the NUJ's agenda.

Course not. The Joos weren't involved.

Correction
Thanks to an (unfortunately anonymous) tip in the comments, the BBC is reporting

The UK's National Union of Journalists (NUJ) has strongly condemned the abduction of BBC reporter Alan Johnston in Gaza more than a month ago.

Delegates voted unanimously to support the campaign to free him at their annual conference in Birmingham.

So they do look after their members. Well, sorta. You see, there's been no actual action against the kidnappers, unlike that against the Joos. Sorry, Zionazi slime. Ooops, Zionist Entity. OK, if you have to, Israel, but everyone knows how they feel about them.
Anyway, regardless of my opinion of Mr Johnstone and his colleagues, I hope he gets home safely.