Democratic? Are you serious? I don't think there's any instance were some democratic principles weren't suspended to varying degrees when a country went to war.
Besides, Israel does have a reputation for killing journalists. It's usually when those journalists approach a tank or patrol boat after warning shots have been fired, but sometimes just for approaching them. Anywho, you can't "imbed" journalists in a loosing side of a war, or they'd be wiped out. I genuinely don't know if any journalists were imbeded inside Iraqi Republican Guard units, but they probably didn't get a chance to file their reports.
Given Hamas' style of conducting 4GW, what do you think would happen to journalists, especially western journalists, inside Gaza? They'd likely be holed up inside "secure" and "off-limits" hotels. You know, like the UN buildings that were used as mortar nests. Given Israel's actions so far, their barring of journalists seems to be a safer bet.
But you are right. It is imprudent to cast judgement so far, and Israel is not a gentle teddy bear to Palestinians. What I see so far puts all of the blame for this flare-up on Hamas, but there are faults in both sides.
Oh, and speaking of the "accuracy" of Al Jazeera, iirc the Arab world was taken by surprise when Baghdad fell in 2003 because they actually put credence in the Iraqi propaganda minister's reports. What was his nickname on late night TV? Baghdad Bob or something? So on any issue, you have at least three sides; you have one player's side, the other player's side, and the truth. I suspect that in this case, the truth is far closer to Israel's version of it than the Palestinians. That doesn't discount the casualty figures though...
Time will tell, but the conflict will not end.