Why did the Indian Government Ignore Warnings Prior to the Mumbai Attack?

The Indian government was warned prior to the Mumbai terror attacks by it's own intelligence agency well in advance (see video below). Why did they ignore the warnings? It is reminiscent of what happened prior to 9-11 and before the London terror attack.

India's intelligence agency warned as recently as November 18 that Pakistan-based militants were preparing to launch an attack on Mumbai - warnings that the Indian authorities are now accused of ignoring in the months before gunmen stormed the country's financial capital, killing at least 174 people.

Indian and European intelligence officials tell CBS News correspondent Sheila MacVicar the information gathered was specific enough to cite threats to Mumbai's main hotels, and the possibility that Islamic militants might use boats to penetrate the city's weak coastal defenses.

The investigation into last week's attack is still developing, but law enforcement officials have said about 10 well-armed, well-trained terrorists came ashore on small boats Tuesday night before methodically ambushing guests at two of Mumbai's most exclusive hotels.

The head of an Indian fishermens' union says he warned the government that militants were using sea routes to smuggle explosives four months ago, reports MacVicar, and a captured Lashkar-e-Taiba operative told Indian interrogators months ago that he had carried out reconnaissance of both the Taj Mahal and Oberoi hotels.

Lashkar-e-Taiba, or LET, is the Pakistan-based group increasingly suspected as being behind the Mumbai attacks. Intelligence sources tell CBS News that the LET is still getting some level of logistical and financial support from members of Pakistan's powerful military spy agency.

[...]"One of the problems is that they had so many warnings that they didn't know which ones to take seriously," said Michael Clarke, a terrorism expert and director of the Royal United Services Institute.

Clarke told CBS News that India's counterterrorism apparatus is in bad shape; used to getting so many warnings that they've become "out of the habit of taking them seriously."

"If you look at the pattern of attacks there (there were two previous attaks in Mumbai) it's astonishing that it's not better," said Clarke.

Senior Indian government officials, including ministers, have already resigned, but angry protesters have been taking to the streets, demanding to know why all the warnings were ignored.

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There had been similar terror attacks in Mumbai. The Indian government should have been prepared. This incident is from 2006:

Prime Minister Manmohan Singh praised this wounded city for its strength Wednesday, vowing that “no one can make India kneel,” while a senior investigator said the Mumbai train attacks that killed at least 200 people could be linked to a Kashmiri militant group.

A Foreign Ministry official demanded that Pakistan dismantle all terrorist networks on land it controls — but fell short of directly accusing India’s nuclear-armed rival for the attacks.

Singh highlighted the achievements of this city of 16 million, which staggered back to life despite attacks on the commuter train network Tuesday that killed at least 200 people and wounded more than 700.

“Your resilience and resolve will triumph over the evil designs of the merchants of death and destruction,” Singh said in a televised speech. “Let me say again, no one can make India kneel. No one can come in the path of our progress.”

Eight bombs ripped through packed trains at rush hour, stunning a city that sees itself as the embodiment of India’s global ambitions, where the country’s business community and entertainment world come together. The number of dead has risen steadily as rescuers have found more bodies and people died of their injuries.