>Why does Israel have such a privileged status with respect to other nations? If it were any other country, US news organizations and politicians would be up in arms about a foreign government directly manipulating US public opinion. But this one country is special. Why?
Religion, mostly. Despite its secular and liberal pretenses, the US and in particular the US government is deeply influenced by Conservative and Evangelical Christian interests, among which support for Israel is seen as a necessity to bring about the apocalypse and second coming of Jesus. Many Americans see themselves and their nation as metaphysically blessed, founded by and given a destiny by God, and see Israel with a similar metaphysical lens. Therefore, Israel can never been seen as merely a state. Everything it does is entangled in America's own sense of cosmic self-importance and destiny.
Also, Israel is good money for the American military industrial complex. Setting aside the many Americans who ultimately believe a global war allied with Israel against the Islamic world is inevitable (as per their interpretation of the Book of Revelations) and their influence on American foreign policy, the mere presence of Israel as an ally creates enough chaos and discontent to fund America's war racket in that part of the world indefinitely.
>Isn't this eroding free speech in the US? How is it constitutional that saying something about the politics of a foreign government could lead to increased prison sentences for US citizens?
It's particularly weird when you consider that antisemitism and racism are often given a full-throated defense by Americans in the name of freedom of speech, a nation that proudly declares the Klan can march in the streets and Mein Kampf can be bought in bookstores, but public opposition to the policies of the state of Israel - opposition by a public which includes many Jews - results in the swiftest and most pervasive crackdown on free speech that I've seen in my lifetime. Or at the very least since right after 9/11.