Kashmir was attacked by Pakistan. 1/3rd of Kashmir i.e. Aksai Chin was ceded by pakistan to China with out approval of anyone.
Article 370 gives all rights of autonomy to Kashmir. India didn't gooble it. That was accepted by the world and Kashmiris. The King of Kashmir was forsighted to have a pact with India.
Pakistan will not succeed in its design to separate Kashmir from India. My prediction is that an international situation may emerge in future, which will force Pakistan to hand over POK to India. India has done well to join hands with USA. Without USA's support no such so-called freedom movement will succeed.