The best thing that can happen to a muslim is to die on the haji because it's a sure way to get to paradise. Therefore, any attempt to reduce deaths during that time is actually a mean thing to do because it prevents people from going to paradise.
"It has been narrated form Abi ‘Abdillah [Imam Ja’far Ibn Muhammad as-Sadiq] (peace be upon him) that he said, “A person who dies while proceeding towards Makkah or while returning back (from Makkah) will be protected from the great distress of the Day of Resurrection.”"
Maladhul Akhyar, Volume 7, Page 223
http://www.al-islam.org/forty-ahadith-on...e-way-hajj
"It has been narrated form Abi ‘Abdillah [Imam Ja’far Ibn Muhammad as-Sadiq] (peace be upon him) that he said, “A person who dies while proceeding towards Makkah or while returning back (from Makkah) will be protected from the great distress of the Day of Resurrection.”"
Maladhul Akhyar, Volume 7, Page 223
http://www.al-islam.org/forty-ahadith-on...e-way-hajj
