Reply To: Hallel with Bracha on YH?

No doubt in my mind that saying hallel on YH was a spontaneous reaction to an admittedly very joyous and happy event. However, it is not clear that gedolei Yisroel of that era were consulted nor had the authority to change the Seder Hatefillah. Consequently, at a minimum there are some very weighty Halachik issues here.