At the end of the day there is always some inaccurate reporting that morons just run with, even after it is corrected by facts. What we know for sure is that Hamas terrorists busted through the fence and massacred a very large number of men, women, children, and babies, and took hundreds of hostages, and fired thousands of rockets into Israel’s civilian populated areas. And you want to dismiss all of this because the initial reports by a few reporters were misstated or misinterpreted, that it has all be a big lie?
To answer your question: IDF commanders know that one of the best “prizes” for a terrorist organization is the kidnapping of a soldier to hold as ransom for the release of imprisoned terrorists, which is against the Geneva Convention, like hiding military operations in hospitals. In response, the IDF established its “Hannibal Protocol,” which is ingrained in IDF doctrine and taught to every IDF soldier. The “Hannibal Protocol” stipulates that if a soldier sees another soldier being kidnapped on the battlefield, or is being kidnapped himself, he must do everything in his power to assure that the kidnappers do not escape with their captive.
Reason: An effort was made to rescue Gilad Shalit shortly after his capture in 2006. The IDF invaded Gaza in Operation Summer Rains to secure his release, but the operation was unsuccessful and seven soldiers were killed. Therefore Israel has to make it as painful as they can for Hamas to play this game and put a stop to it.