Yes, I'm from USA. And to be honest, I'm just trying out some new ideas here. I half-expected to be skewered here for proposing speech controls similar to gun controls, but it's actually becoming a mainstream view. The recent gun control marches have really opened up my eyes to this.
I used to be a proponent of free speech, gun rights, drug legalization, and all the other internet libertarian ideas about freedom. I realize now that the culture is changing rapidly around me and that those old ideas about freedom put you on a path toward isolation, public scorn, and possibly criminality.
You may need to reconsider your ideas about freedom before you get shunned in a way that hurts your family.
Watch the gun control movement, the people trying to solve "fake news" with regulation, and other social movements. They're having great success at trading in freedom for security, and it seems inevitable that the same types of controls will be applied to speech.
It's probably better to adapt early to the new normal and be on the "progressive" side than it is to side with hate mongers, gun activists, and drug addicts to promote freedom. You might think you can protect your family from societal change with critical thinking and appeals to classical liberal ideas, but I believe those ideas are the most likely to get you ostracized in our current environment.
I think your best bet for protecting your family now is to conform early and often. We're going to sacrifice freedom for perceived security anyway, so you might as well get on the correct side of it before you become an outcast. Your comment about what "history teachers hid" from a generation and your need to "protect my family" place you somewhere near "alt-right" in the current landscape. You have to ask yourself if that's really where you want to be.