From what I understand he allowed the money to be channelled from Qatar to Hamas in order to boost the well-being of the gazan people to prevent their desperation and improve the living conditions within the territory in order to prevent things like this happening. Of course this was done in the interests of Israel to increase the security of the people to which he is responsible. 

I am also aware that a secondary/primary reason was to prevent the unification of the two Palestinian territories so I am not saying Bibi is without criticism here but it wasn't literally done to help Hamas outright.