As I've said, you can't trust anything about India in a Pakistani newspaper, or anything about Pakistan in an Indian newspaper. Same goes for Greece and Turkey, etc. etc. etc.
Obviously, pretty much everything about Israel printed in Arab newspapers is worthless rabid propaganda.
HOWEVER, while Israeli and American Jewish newspapers tend to be far more balanced and less nutty (there are some exceptions on the Jewish extremist end) you STILL need to consider their possible "spin."
There is NOTHING the Israeli government would rather do than link Hamas to an attack or attempted attack on a US, rather than Israeli, target, and the Israeli media will be amenable to playing along. The Jerusalem Post is in general a good newspaper but remember this article is basically some spin provided by the Israeli government to try to link their local anti-Israeli terrorists to the US. Keep that in mind.
Interesting. After 9/11 dozens of people speculated that somehow Israel knew of the attack but didn't tell us. Now, Israel is giving us information about current attacks and you are dismissing it. Israel just can't win.