Can we stop with this? Literally any provider of literally anything to the US government could decide at any time to stop providing services to the US government. Companies don't because it's stupid (in terms of economics and business) and would also violate contracts.

The situation with Ukraine was incredibly unique because it's a country depending on a service without any specialized contract between them and the company. They were using service at the goodwill of SpaceX/Starlink/Musk. Nothing else coming from the US was being provided in that method besides individuals throwing money to various military and non-military charities.

Similarly SpaceX now has a contract with the US government and there would be zero reason to suddenly turn around and violate that contract and face penalties.

Do you know that much of the US military's existing satellite communications up to now already go over existing non-Starlink commercial satellites?

And finally I'll throw in this snipped from a tweet of Elon:

SpaceX is building Starshield for the US government, which is similar to, but much smaller than Starlink, as it will not have to handle millions of users. That system will be owned and controlled by the US government.

And I'll add, to be clear, that I highly disagree with how he thinks of the Ukraine war, but it's important to maintain some semblance of realism with all of this, and not try to create comic book villains out of real people.