Devyani case: Why UPA govenment cat against Pakistan and lion against US?

Appreciate the way UPA government has taken firm, bold and fighting staps against US in Devyani Khobragade humiliation case. There is no doubt that US has acted injusticely. But some points need to be considered while going ga-ga with agony against US:
(1) Why UPA government did not show this much courage when dignitaries such as Kalam, Shahrukh Khan were frisked at US airports?

(2) Why UPA government specially MEA minister Mr Salman Khushid did not become angry when Pakistan army soldiers entered in Kashmir and beheaded two Bhartiya soldiers?

(3) Is it because votebank politics? As Mayawati pointed out Devyani is dalit. So acting tough against US can please Dalits and Muslims as many muslims are anti US specially after year 2001. While taking bold steps against Pakistan would make its vote bank unhappy.

(4) Major point is that Devyani's father Uttam Khorgade is former IAS officer and was involved with Adarsh housing society. So doubt raises that as its three chief ministers are accused in case there may be fear to come out truth from Uttam.
As per First Post report,
Devyani Khobragade owns a flat in the infamous Adarsh. Her father Uttam Khobragade was one of the bureaucrats who allegedly misused their positions to help Adarsh. It was during his tenure as general manager of BEST, the civic-owned bus and electricity utility in Mumbai, that the Adarsh Society got additional building rights from an adjacent BEST bus depot. This allowed the society promoters to increase the original plan of six floors to a massive 31 floors. While the Khobragades may want us to believe this is mere coincidence, only other bureaucrats and politicians caught with their hands in the Adarsh till may take such a claim at face value.

That's not all when it comes to Devyani's real estate holdings in Mumbai. When she got the Adarsh flat, she already owned a flat in another government housing society in Oshiwara, which too was allotted under the state government's 10 per cent quota where recipients get flats at extremely cheap rates as compared to Mumbai's stratospheric market prices, and which is another fount of corruption in Mumbai, with most flats cornered by politicians and their relatives, and of course bureaucrats and their relatives, and those connected to their powers that be, making a mockery of the 10 percent quota supposedly for helping citizens who need it most. As the Economic Times reports, a massive 42 percent of such flats allocated in the past 10 years were resold by allottees at much higher prices, making a killing in the bargain at the expense of the taxpayer and the common Indian. Things have become so bad with the 10 percent quota that the Bombay High Court recently warned the Maharashtra government of contempt if it continued to stonewall requests to name double and multiple allottees of such flats.

In Devyani's case, what makes the issue even murkier is the guideline which states that no one can get flats in two housing societies which get land on....