The sentiment is not new, nor is the argument without substance. But the author fails to note the appeal of Jewish tradition and the lack of a means for "repealing" an occasion. Perhaps that alone (the inability to formally repeal outdated norms) is reason enough to mourn.
47 killed in clashes between ISIS, Syrian rebels near Turkey border, monitor says (Reuters)
from the article: Anshel Pfeffer / It is wrong to fast on Tisha B'Av