Nobody here thinks anyone in the US should be unable to use Signal.
Call me extremely pessimistic but events like Jan 6. will be used as justification to start attacking applications that offer end-to-end encryption, and encryption in general. Just like 9/11 was used to justify eroding certain civil liberties.
https://www.theverge.com/22249391/signal-app-abuse-messaging...
Thanks to olah_1 for this reference