It will guaranty freedom of speech, but not freedom after speech. Israel is allowing McCarthyism to creep in, and the reaction will be don't speak out, don't sign petitions, don't join organizations, don't read certain books that may be proscribed now or later. However, a democratic society needs exactly that kind of discussion and debate.
Pakistan: Suicide bomber attacks tribal police, killing 4 (Reuters)
from the article: Israeli academics, sign a petition at your own risk