We are inclined to say kaddish on the yahrzeit of a very dear friend who was not Jewish, just as we would for a relative. Is there a reason not to? I am also interested to hear reasons why this is a ...
I have read that Jews recited kaddish on behalf of Abraham Lincoln after he was assassinated. What is the halachic basis for this and has kaddish ever been said en-masse on behalf of other non-Jews?