If you are wondering how close you are to any one of America's 900+ known hate groups, you should know that the Southern Poverty Law Center keeps a comprehensive map. If you have gotten the impression that there are considerably more of them than there once were, you are right.
The SPLC has documented an explosive rise in the number of hate groups since the turn of the century, driven in part by anger over Latino immigration and demographic projections showing that whites will no longer hold majority status in the country by around 2040. The rise accelerated in 2009, the year President Obama took office, but declined after that, in part because large numbers of extremists were moving to the web and away from on-the-ground activities. In the last two years, in part due to a presidential campaign that flirted heavily with extremist ideas, the hate group count has risen again.
There have been more than 100 new hate groups to make the SPLC lists since the beginning of the 2016 presidential campaign. SPLC notes In a report last February, SPLC noted that "Trump’s run for office electrified the radical right, which saw in him a champion of the idea that America is fundamentally a white man’s country."