Which Israel should Palestinians recognise?

An article on Kanaan on line (KOL) argues that for Hamas to recognise Israel would be a "lethal historical blunder". It points to one little problem that no one in the mainstream seems to have picked up on and that is:

what Israel does Hamas have to recognize? Is it Israel in accordance with the UN Partition Plan embodied within resolution 181? Or is it Israel within the 1967 borders embodied within UN Resolutions 242 and 338? Or is it Israel under the status quo where the wall and the various settlements obliterate any possibility of a viable and contiguous Palestinian state?

And this is where it could get lethal.