By Shahar Ilan : Number of people denied entry into Israel up 61 percent since 2005
Talkback
Title:Finkelstein Would Not Be Allowed in
Name:ph
City: State: FL
The Law of Return has very specific exemptions that allow entry to be denied:

[2] (b) An oleh`s visa shall be granted to every Jew who has expressed his desire to settle in Israel, unless the Minister of Immigration is satisfied that the applicant

(1) is engaged in an activity directed against the Jewish people; or

(2) is likely to endanger public health or the security of the State.

It appears that NGF would fit under either or both of these categories.