They are not only interested in border they are interested in Agriculture , Space , desalination of sea waht for coastal cities , and its not Israel who is interested in border its India which is in process to seal their wester borders and , Israel has technology to help us which we lack . Israel is interested as they will get a reliable market for their technology ..... just FYI Israel is not only interested in Indian borders they borders but they have helped US in maintaing Mexico border ..
http://www.ibtimes.co.uk/israels-elbit-systems-wins-87m-contract-us-mexico-border-fence-1439378
The reason Israle is interested is they get business the reason India is interested they get well proven technology to save the borders , do you have any problem in that ????