Remind me of what nation wont sanction you or stop support your systems if you go against their interests? Maybe Russia, depending on where you get involved, but not too many others. It happens that the US is more easily bothered than say, France, the UK or Russia, but do you honestly believe that through all ills and tribulations that France would support your Rafales, even if you anger them? Of course they wont, and you'd be left on an island. It's an overblown concern, all nations will respond if their interests are threatened. The US just has more interests and presents a greater risk for India.
The Indian defense establishment sees the risk as diminishing, hence multiple deals with the US for S-70B, AH-64, C-17, P-8I and other US gear.
Would these deals have happened if India was concerned about sanctions or would they have opted for Russian or indigenous designs instead?
And if France, as @Chinese-Dragon noted , is susceptible to US pressure, as seen with the Mistral saga, would the Rafale be a bad investment for India too due to the susceptibility of France to be pressured by the US?
I've seen no indications that that would be true.
That is why we asked them the ToT of Rafale .We did the same in SU 30mki and now our HAL have 100% technology for the production of of MKI .And unlike Russia we have other big defense deals with France like Scorpene deals .French companies will face huge loss and market loss if they attempt for something like that.
You should also follow the procurement methodology of the GoI .S 70 B and AH 64 didnt inked until now.Perhaps it may be in near future .Other weapons are 3 most expensive aircrafts like C17,C130 and P 8.And each of them have Russian equvialent in our inventory like IL 78.,AN32 and Tupolev.
And there is another Indian system that can be equal to AH 64 ,the LCH.