Rav Gifter explained the svara:
Or some other suggestions...
The Nesivos Shalom said that the magnitude of the holocaust was just too massive for any fast day to
So paskened the Chazon and Rav Moshe Feinstein
This is Rav Moshe's lashon
Some argue that you don't pasken halacha from a kinah
Rav Herzog held that the whole pshat is incorrect
A lot more to discuss.....