You can scream up and down about how building such things is a horrible idea because it can one day be used for evil, and folks will either yawn or call you paranoid or worse.
Then the thing actually gets (very lightly) abused/used for something folks don't like and omg it's an emergency no one could have ever predicted! And oh look - it's often times far too late to do a damn thing about it other than surface level 'fixes' that are nothing of the sort.
It gets very frustrating living in such a society, but it might simply be the way humans are wired. If it's not in your face and actively a major problem to you in the moment, it's simply not a concern.
I was always anti-IoT for this exact reason.
The way to avoid masked gestapo thugs is to ensure that not even your preferred leaders are able to create them.
2. What you mentioned sucks. But it's hard to get the public to care about things that don't directly affect them and their day to day lives. My wife somehow browses the internet without an ad blocker even though I've told her that they track you and are basically malware, but knowing that doesn't change her browsing habits or make her even want to use an ad blocker, even if the ads are hostile to her experience.
3. Once the ICE thing came to light, suddenly people were like, wait, they can use this information to deport us or kill us? That's not OK.
Until recently very few people could articulate the real risk this tech posed, now you can literally see it play out (depending where you live)
They weren't being used to build concentration camps before.
1. They didn't know about it. It's only recently that there have been popular youtube videos on the topic. Critical mass can take time.
2. Before "the whole ice thing" there wasn't a team of masked brownshirts terrorising communities and using all available technology they could access in order to undertake said terrorising. That these cameras are part of that available technology, the timing ain't weird at all. In fact, it was pretty predictable.
But, yes, should have been up in arms beforehand, but likely the knowledge and visceral demonstration of the effects were not known. Visceral demonstration does pretty heavy lifting.