Ask yourself this. If all those decades of diplomacy and cajoling India were terrific…then why were they able to be undone in a week?

No one ever said it was "terrific". But it was progress in our favor. Not as solid as our European allies (which the Felon also is eroding), but progress. The Felon has nuked that, and it may take a generation (or more) to repair that damage.

Think of it this way...in high school you probably had guys you were neutral towards. Not buddies, but you got along. Then one of them finds out you kissed his girlfriend. Suddenly, he's very hostile towards you. It wouldn't take a rocket scientist to figure out why.

I do agree that India is acting in their own self-interest. But part of that is a reaction to tariffs and sanctions imposed by the Felon (which, fortunately, have been ruled illegal by the courts...but the damage is already done).