Well, this seems weird. For over twenty-five years, Christian groups have traveled to Israel to keep the Feast of Tabernacles, but this year, Israels Chief Rabbi is calling the practice into question because he believes Christians are trying to proselytize:
With all the danger from without, I hardly think a hardline stance against Christians makes sense. They seem to be the least of Israel's worries these days.
"According to information that has reached the chief rabbinate, there are participants in this conference who convert Jews to Christianity and perform missionary activity throughout the year," said Rabbi Simcha Hacohen Kook, the chief rabbi of Rehovot, who took part in committee discussions of the matter. "This is against the law, so the chief rabbinate is calling upon Jews not to take part in the conference."
Israel has laws against missionary work, and for many here, proselytizing is dangerously close to the forced conversions European Jews endured for centuries.****
According to the Old Testament Book of Zechariah, all nations will make pilgrimages to Jerusalem in the messianic era to celebrate Sukkot. Christians have interpreted this to mean that Sukkot is a holiday where Jews welcome non-Jews to join them in celebration in Jerusalem.