I have looked all over the internet and can find no evidence of the UK and India being enemies. I have however found quite a bit of evidence that contradicts your claim:
In 2008 Britain gave India a £825 million aid package to help India develop its health and education systems.
http://news.xinhuanet.com/english/2008-09/30/content_10135165.htm
http://www.theguardian.com/world/2008/nov/19/britain-aid-to-india-825m
According to French diplomat Marc Fonbaustier, the relations between the two countries are key in the UK's geopolitical strategy in Asia because they share a base of common values. India is the hope for a Western style development based on democracy versus the Beijing consensus of state-guided growth.
http://www.digitaljournal.com/article/343948
Britain supports India’s case for permanent membership of the United Nations Security Council as well as bilateral cooperation in civilian nuclear technology.
http://en.wikipedia.org/wiki/India%E2%80%93United_Kingdom_relations#Defence
On 14 October 1997, Queen Elizabeth II visited Jallianwala Bagh and paid her respects with a 30‑second moment of silence. During the visit, she wore a dress of a colour described as pink apricot or saffron, which was of religious significance to the Sikhs. She removed her shoes while visiting the monument and laid a wreath at the monument.
http://www.nytimes.com/1997/10/15/world/in-india-queen-bows-her-head-over-a-massacre-in-1919.html?smid=pl-share
In February 2013 David Cameron became the first serving British Prime Minister to visit the site,laid a wreath at the memorial, and described the Amritsar massacre as "a deeply shameful event in British history, one that Winston Churchill rightly described at that time as monstrous. We must never forget what happened here and we must ensure that the UK stands up for the right of peaceful protests". Cameron did not deliver an official apology.
http://www.bbc.com/news/uk-politics-21515360
http://www.dnaindia.com/india/report-jallianwala-bagh-killings-shameful-says-david-cameron-1802074
Hardly strikes me as the work of an enemy
In addition to being ignorant of the nature of ISIS, you also seem to be Anglo phobic. But even so, you 1000 time better off having dealings with the Brits, then ISIS