They looted and then burned down the greenhouses left by the Gaza Jews.
That is an urban myth.
The Palestinians in Gaza did not destroy the greenhouses, as within weeks they were back in fully production. This is despite the fact that the greenhouses had their irrigation systems taken out before the handover, and in other areas, the produce of the greenhouses (which had already been purchased by the Palestinians) had been destroyed when the water systems were cut off.
Since the handover, Palestinians have made repeated attempts to export agricultural produce from Gaza, but this has been refused, for "security reasons." It has been a loss of millions of dollars for them.
Some references to the Gaza greenhouses:
http://news.yahoo.com/s/afp/20051019/wl_mideast_afp/mideastgazaagriculture
Oct 19 2005
GAZA CITY (AFP) - Gaza Strip farmers have renovated more than two-thirds of the greenhouses left behind after Israel's withdrawal, creating jobs for some 2,500 agricultural workers, officials said.
Figures published by the Palestine Economic Development Company (PED) show that in the month since Israeli troops left Gaza, Palestinian agricultural workers have refurbished some 2,200 dunams (22 hectares) of greenhouses out of the 3,162 which were transferred to them. ...
http://www.worldnetdaily.com/news/article.asp?ARTICLE_ID=46011
Israel shuts off water, dries Gaza greenhouses Multimillion dollar deal set to transfer structures to Palestinians
August 29, 2005 By Aaron Klein
JERUSALEM – After months of intense negotiations recently culminating in a deal allowing for the transfer of Gaza's high-tech Jewish greenhouses to the Palestinians, several former Jewish residents who briefly returned to their farms told WND they were shocked to find most of their produce has died because Israel turned off the water in the area.
"I couldn't believe it. Almost all of my crops are dead, and the rest is dying," Anita Tucker, one of the pioneer farmers of Jewish Gaza told WND. "I hope the Palestinians aren't expecting fresh produce. ... A fortune in crops is now all gone."
The greenhouse deal, reached just days before the Gaza evacuation, sold the area hot houses for about $14 million to the Economic Cooperation Foundation, an international fund which in turn will transfer the structures to the Palestinians.
… About one-quarter of Gaza's Jewish greenhouses were previously dismantled and moved to new communities in Israel by their owners. The foundation deal reportedly covers the majority of the remaining hothouses.
The first payment to the former farmers of Jewish Gaza was transferred this weekend to a committee working on their behalf. …
But several Jewish Gaza refugees who were allowed to briefly return to their hothouses said most of the produce currently inside is now dead.
Tucker, who owns large structures, said her hothouses were set to be watered by automatic irrigation systems.
"The sprinkler systems didn't work because Israel stupidly turned off the water after the Gaza withdrawal," said Tucker. "All my work, down the drain."