The fact that Jews regard Christianity as false no more justifies this spitting than the fact that Christians believe Jews have rejected Jesus as the true Messiah justify Christians spitting at Jews.
Let me ask you something: what purpose do you think this thread serves?
Israel is a Middle Eastern country, and the traditional people who live there, of whatever religion, have a distinctly pre-modern and Middle Eastern mentality. Charedi Jews and the ancient liturgical chr*stians (particularly those in Israel) have a visceral dislike of each other that is hard for modern westerners to comprehend.
Authentic Judaism isn't some nice, American suburban congregational religion. And it is a statutory religion, not a salvational one as chr*stians understand it. Chr*stians need to stop viewing Judaism as chr*stianity minus J*sus because it's not and never was.
American chr*stian conservatives need to understand that real Orthodox Judaism is not a pluralistic, multicultural, kumbaya religion. It regards itself as true to the exclusion of other religions, regards Israel as its exclusive holy land, and does not share the philo-Semitic chr*stian view of being two historical stages of a single religion united with chr*stians against a hostile world (instead it faces a hostile world on its own). I'm sorry, but that's the way it is.
And before I close, for what it's worth, I have spent time recently (during the Glen Beck thing) defending philo-Semitic chr*stians from very Theocratic Jews just like the ones I'm defending here. I defend you to them, and them to you.
Dang. What a job!
At any rate, while there is a Halakhic responsibility for Jews to manifest hakkarat hatov (gratitude and appreciation for their friends, including chr*stians), the liturgical chr*stians of Israel are not philo-Semitic nor friends of the Jews in any sense. They are probably the most anti-Semitic chr*stians in the world, and they get away with it because it's politically correct to be anti-Semitic against Orthodox Jews in Israel.