While these causes may be noble indeed, there is a much larger gathering, perhaps the largest gathering of Jews in modern history, which takes place yearly in Eretz Yisroel.
I am referring to the proclaimed Yahrtzeit of Rabbi Shimon Bar Yochai, which takes place in Meron on Lag Baomer.
Hundreds of thousands of Jews of all stripes and persuasions gather on the 33rd of the Omer to mark the contribution and legacy of RSBY.
What is remarkable is that there are Sefardim and Ashkenazim, Ethiopian and Caucasian, religious and non-religious, all united together to celebrate what has become a Jewish holiday.
Whereas we find in the world around us that gatherings are primarily formed to cheer the living, Jewish people find it noteworthy to honor their dead. No non Jewish funerals, with the possible exception of forced attendance by dictators, can boast the hundreds of thousands of mourners who attend the Levayos of the Talmudic greats, usually within several hours of notice.
Mi K'Amecha Yisroel!