When Nazis came my grand father was a teenager. A lot of local chads believed in them and joined SS and did all the dirty work. Then when soviets came these chads were afraid that they will be prosecuted for murdering Jews so they did the only logical thing - joined soviet milicija. What basically made them untouchable.
My grand father's brother ran away to US. These local chads then could "prosecute" all the family for "joining partisan movement". It was not soviets from Moscow that were counting every head. It was local supporters who knew each other from the high school. If there was some brother missing in family, they could send all the family to gulags, take over the land, take over houses by accusing family joining partisans. So my grand father spent his teenage years hiding in neighboring villages.
It is not Google who will give you out. They will have upper hand if anything because they are big and etc.
It will be your employer who will comply. It will be your local mailman (what was all these packages you were receiving from China?). It will be your neighbor who likes to shoot guns and doesn't like you for one reason or another.
What people should understand that this "fascist government" will be sitting in DC. They will not be sending somebody from DC to Minnesota because "someguy at gmail dot com" wrote something against them. How inefficient that would be. It will be local people who will be supporting "the new great government". And they have much more compromising information about you than your emails.
When the doomsday comes you will not be hiding your baked beans in your bunker from zombies. It will be your neighbor whose three kids are starving. Or just your other neighbor who likes guns and to eat. And he is hungry, pretty hungry right now.