Read the article, it mentions the Israelis say they were scouring for explosives buried in the buffer zone and not aiming for the house at all.
As for this violating Oslo, you should agree the many tons of armaments the PA has brought in illegally and the many dozens of suicide bombings attacks etc. have violated and killed the agreement. Oslo is dead.
Two points. First, according to the article (at least, according to the Israelis quoted in the article), they were not there to knock down his house. They were there doing a mine sweep - it was close to his house, but they weren't going to knock it down. I have no idea how credible this is - the pictures do make it appear the bulldozer was heading towards the house. On the other hand, there are no reports of them knocking down any houses at all that day - either Dr. Samir's or others.
But the other point is that the Oslo agreements no longer apply, sadly. They have been routinely violated. I place most of the blame on the Palestine Authority, who would violate the points that they agreed to - then Israel would not follow through with their promises either. As a result, the agreement is now thoroughly dead. This is, actually, official, since the timetable agreed to has now passed. Dr. Samir may or may not have had any hand in the PA's violations, but he is certainly no longer protected by that agreement either.
Drew Garrett
Because the Israeli justification for demolishing homes in Rafah is security-related--"Every house that's been taken down, it has been taken down because it's been used to shoot at us," an Israeli army spokesperson says--I ask Dr. Samir if there would be any reason for the Israelis to consider his home a threat. Any shooting from this house? Any underground tunnels from Egypt surfacing here? "You can't ask that," he says. He and his family, he says fiercely, are "normal."
Seems that Dr. Samir doesn't mind harboring violent terrorists (American or Palistinian). Sounds like a good enough reason for me.