The alt-right (or alternative right) movement has been gaining ground in some parts of the world and, emboldened by internet anonymity and an appetite for rhetoric, they have found an audience among some disgruntled white men who view the encroachment of foreigners into their territory as anathema.
Make no mistake in that these are white supremacists who pine for a society devoid of visible minorities, jews or any other group that threatens their vision of a “Leave it to Beaver” world that no longer exists. Most are not religious and in fact their viewpoint contrasts sharply with the idea of love of neighbour which forms an inherent part of most faiths.
Trump’s adoption of Steve Bannon (of slimy Breibart news fame) as a political advisor has certainly not helped matters and there are videos online showing people doing hand salutes to Trump (a la hail Hitler) which will give you the shivers. Somehow his election has sent them the message that this new administration is on their side.
It's not so much that Trump went looking for these trolls (I don't think he's that well informed) but by simply basing his campaign on inflammatory rhetoric it was enough to embolden them....