Parents entering on B2 visa from a different port of entry

Hello there,
I reside in Fremont, CA and I have my parents planning to visit me on B2 visa. They are Indian citizens but are currently in Europe at my brothers place on Schengen Visa. I have their flight booked from Denmark to New York as it was a cheaper option (when compared to SFO). With that plan, I am thinking of going to receive them in NY, do some site seeing in New York and then bring them to SFO with me. They will be going back to India from SFO.

Can there be any issue for them to enter the US via JFK?
I am going to have them carry the full itinerary which will show our stay in NYC, the flights booked to SFO and the final flight back to India as well.

Port of entry doesn’t matter.