LeT is a state sponsored terrorist organization. It was founded by General Zia as he proudly declaimed that he would "Bleed India with a Thousand Cuts". I suggest reading the books written by Pak Generals to know that they fully believe in investing in militant/terror organizations - it is a firm and unalienable part of their military culture. Such a culture was actually encouraged by the US initially before the 9/11 blow-back.