I promise you that Google’s attempts to break AdGuard or the federal government’s begging Apple and co to create backdoors are not an attempt to stop domestic terrorism.
The most effective thing you can do to reduce domestic terrorism in the US, which is usually stochastic in nature, is to deplatform the people riling these people up.
Did you not notice how much quieter it was with Trump off of Twitter? When was the last time you heard anything about Alex Jones that wasn’t about his legal woes?