According to both ABC News and WorldNetDaily, Hamas seeks to impose Sharia (Islamic Law) on territory held by the Palestinian Authority.
Here’s what a Hamas spokesman told WND:

“We are holding emergency meetings to decide our next course of action,” chief Palestinian negotiation minister Saeb Erekat told WND. “I don’t think Fatah is going to join. This is not our way [to be in the minority].”
At least 13 people were injured in the clashes outside the Ramallah parliament, and light damage was done to the building, security sources in Ramallah said.
“The Hamas members were dancing with their flags, and they announced Sharia law will soon rule in the Palestinian territories,” said a source.
Today’s clashes were the latest in a series of reports indicating Hamas is seeking to impose Taliban-like Islamic rule on the Palestinians.
A Hamas-run council in the West Bank recently barred an open-air music and dance festival, declaring it was against Islam.
“This is not acceptable,” festival head Eman Hamouri told reporters at the time, accusing Hamas of trying to force its values on others. “We condemn this and we have sought the help of the Palestinian parliament to discuss this serious issue.”
In response to the incident, al-Zahar told WND: “I hardly understand the point of view of the West concerning these issues. The West brought all this freedom to its people but it is that freedom that has brought about the death of morality in the West. It’s what led to phenomena like homosexuality, homeless and AIDS.”

Does that mean before there was freedom, there was no homosexuality? No homelessness? Does it mean that the African countries most plagued by AIDS are those most guilty of having freedom? (Robert Mugabe, call your office….)
Perhaps I’m out of line trying to apply logic to statements by a spokesman for Hamas, but I hate to see democracy being used to destroy freedom.
There’s more:

Israeli officials say Hamas in the Gaza Strip has established hard-line Islamic courts and created the Hamas Anti-Corruption Group, which is described as a kind of “morality police” operating within Hamas’ organization.
Hamas has denied the existence of the anti-corruption group, but the group recently carried out a high-profile “honor killing” widely covered by the Palestinian media.
Last April, Yusra al-Azzami, a young female university student from Beit Lahiya in the northern Gaza Strip, was caught by Hamas, together with another female, riding in a vehicle with two men. The Hamas members, reportedly officers of the Anti-Corruption Group, suspected the vehicle occupants of “immoral behavior” and shot at the car, killing al-Azzami and wounding the other occupants.

I found confirmation of the “honor killing” story here; it turns out that the victim of Hamas’s morality police was on a date with her fiance.
Considering the callused attitude of Hamas towards its own people, I don’t doubt that they’d be more than willing to assist Iran in carrying out its promise to use nuclear weapons against Israel, and even if millions of Palestinians were killed in the process, that would be considered a good thing, because “the Jews” would be destroyed. That’s because in the game of martyrdom, the innocent have nothing to fear, because they’re headed for Paradise.
Is sitting around and waiting for it to happen the best way to preempt such stuff?