When India was invaded by China in 1962 some of the guys from Left even thought it was a welcoming proposition. When the present UPA government under Manmohan Singh wanted to sign Nuclear Deal with USA, the Left opposed it. Its not that they are against the contents of the deal- they are just opposed to signing it with USA. A similar deal with a communist country is quite welcome to them. So, if it is with China, it is OK, but if it is with USA, it is not OK