Muraliravi:
Now that you articulate your concerns the way you have presented them now, it makes them a set of valid and objective questions to me.
While I cannot answer for Modi and BJP, my 2 cents on the issues are:
1) Deportation never works. Sorry to bring in America, where I live, but even America has not managed to deport Mexican illegals. Sure, they have policies, departments and projects like
ICE. It is practical to deport a handful every now and then to just serve as a feeble deterrent. As long as there is support on both sides of the border, such actions will not bear real fruit.
The more India progress/advances and provides better opportunities to its citizens, the greater number of BDs will infiltrate into India seeking better life. So what can India do then?
a) Pull Bangladesh into a different union of sorts - say 'United States of India" (or Bhartiya Rastra) with Bangladesh, Bhutan, Nepal etc. With common currency, some amount of economic and political unity. India will have to get in bargain access to those markets and resources. Bangladesh will then provide an easy and inexpensive access to Burma and beyond in S.E. Asia.
The logical question would then be "What about so many BD Muslims?" Islamic reform is a dicey subject off and on the forum. However it leads to your concern #2, that we will come into a moment.
However, since deportation is not a valid option why put that in the manifesto? Why list something in the manifesto, that can never be achieved or done? One could argue BD could have found a place, but Modi has been relatively quiet about Pakistan as well. His goal is to push the Congress out, and the family into oblivion. Anything else is mere distraction.
2) On the subject of temples being controlled by Government. I agree with you, it is a massive injustice to Hindus. In fact the Indian Constitution itself could be considered a disservice to the Indian traditions. I would have liked the Constitution to be based on Dharma, well that is another dicey subject on and off the forum.
On that account, I only wish/hope Modi & BJP does remove the temples out of the government control without much fanfare and even if it is not mentioned in the manifesto. Like you say, Hindus know to take care of themselves.
So the first concern (related to BD) requires a good team of experts to come up with a set of solutions - each of which will have its pros and cons, while your second concern can be dealt easily and silently.