Analysis of information sources in references of the Wikipedia article "Axis of Resistance" in English language version.
the most obvious thing is the unprecedented development in Russia's relations with the Arab Gulf states, especially Saudi Arabia, in the context of Russia's pursuit of a strategic partnership in the energy field, with the GCC countries
Returning from a summit in the Saudi capital last week, opposition leaders say they were told directly by the foreign minister, Adel al-Jubeir, that Riyadh was disengaging.
Assad, backed by Hezbollah and Iran, began his campaign to eradicate Sunni regime opponents...this new axis — which targets Syrian Sunnis instead of Israel — is deeply polarizing.
The Hamas criticism might also reflect the underlying sectarian tensions within the alliance: Hamas is one of the only Sunni Muslim factions in the group (Palestinian Islamic Jihad, or PIJ, being the other). The others, including the Alawite family that dominates Syria, are Shias of varying schools of thought.