"why did the government announce it is increasing security instead of suing the Financial Times in London ? "
You have implied that Pakistan should sue the FT, whether intended rhetorically or not. I have given you a straightforward answer as to why it is a waste of resources to attempt litigation against a foreign newspaper and resources are better spent on controlling the primary narrative to begin with.
Let me add that Adil Raja is easier to sue, hence the reason litigation efforts remain a selective and targeted strategy. What don't you understand about this simple response to your question, "rhetorical" or not?
I question the authenticity of the FT report, indeed I am fully cognisant of the agenda being served through the deployment of partial truths, incomplete truths, and outright falsehoods.
You habitually cite references that are well know for their Delhi-centric amplifications, e.g. FT and AJ. It really isn't difficult to figure this one out.
Let me also add that propaganda serves an additional purpose beyond that of narrative control - that of promoting actual real-world action by involved parties. It is part and parcel of information warfare and there are countless examples in history. This is the very origin of the term "self fulfilling prophecy", should you be interested to know of such matters. So for Pakistan to respond to globalised propaganda of "attacks on mines saaar!!" with enhanced security is not as dumb or cynical a move as you think it is. You are citing the increased security as some sort of "circumstantial evidence" of increased attacks, which is a bit of a schoolboy error on your part.