UPDATE (April 25 @ 7:41 p.m.): A third Palestinian jihadi-takfiri group, Jaysh al-Ummah (Nation's Army), has issued condolences to the ISI. Read it via my Scribd account HERE.
I find it very interesting that the first two condolence statements released (that I've seen) to the Islamic State of Iraq (ISI) for the killings of its two senior leaders, Abu 'Umar al-Baghdadi and Abu Hamza al-Muhajir (Abu Ayyub al-Masri), have come from small jihadi-takfiri groups based in the Palestinian Territories, specifically the Gaza Strip. Jama'at al-Tawhid wa'l Jihad (Organization of Absolute Monotheism and Struggle) in Bayt al-Maqdis (Jerusalem/Palestine) and Jama'at Ansar al-Sunna (Organization of the Sunna's Partisans; Sunna referring to the Prophet Muhammad's reported sayings & deeds) in Bayt al-Maqdis have both issued condolences to the ISI and the transnational jihadi-takfiri movement (see embeds below).
Despite the fact that no Palestine-based jihadi-takfiri group has received the public endorsement of Al-Qa'ida Central (AQC), these two groups were the first, it seems, to address a watershed moment in the history of the ISI and the transnational movement. Both statements include words of praise and prayers for the "two mujahid (warrior) Amirs (leaders, commanders)," and speak of a coming victory through "martyrdom."
Jama'at Ansar Al-Sunna Palestine on Baghdadi & Muhajir (April 25)
Jama'at Ansar al-Sunna in the Land of Bayt al-Maqdis
Jama'at al-Tawhid wa'l Jihad in Bayt al-Maqdis on al-Baghdadi & al-Muhajir
Jama'at al-Tawhid wa'l Jihad in Bayt al-Maqdis