That "can't happen here" type argument didn't quite work in the US, though, can't see why it would work here any better.
At the risk of sounding complacent, I think the risks in the US have been much higher for a long time, with all sorts of risky ingredients such as the widespread undisguised racism (evidenced in continuing use of the Confederate flag by public bodies) and fundamental Christianity, the inhumanity of the healthcare system etc. One might argue that the sense that the US was healing under Obama was merely a mirage, and none of the systemic potential flashpoints really went away, and in fact having a black president merely inflamed the bigots even further, making them more intent on pushing back on progress.
But it's no reason to be complacent, for sure.