You are one hundred per cent right. Israel must demand that the PA government fulfill the three conditions of the Quartet: recognition of Israel's legitimate sovereignty, acceptance of all previous signed agreements and renounciation of terror. Anything less would be a delegitimising of the State of Israel. If Hamas wants to be regarded as part of a legitimate government, as opposed to a terror organization, it must assume the role of a legitimate government.
Merkel says would welcome constructive Iranian role in any Syria talk (Reuters)
from the article: Hamas: No connection between Shalit release, formation of unity gov't