Trump and national particularism

Watching history change with your own eyes; Trump becoming the 45th president  and the women's march conducted on every major cities I have a few thoughts about why Trump attracts some people. Don't get be wrong I'm a democrat and this doesn't mean I'm supporting him, but I wanted to analyze Trump's strategy from fair standing point. Trump has been using roughshod expressions in speeches to whom he considers it would bring disadvantages to himself and his supporters, and this was derived from the fundamental belief of national particularism. US had been playing the role world's police in where it would military contain other countries to maintain democracy, and this goes beyond forces as US contributed and developed the world's economy. Yet at the same time there were people who were frustrated in how US was involved in the world: they would question why help other countries if it's not benefiting US? Why increase military budget just to keep military forces in the far East Asia? Why continue NAFTA if it's doing more harm to our own economy than good? Trump took advantage of these concerns and indicated US would be ran on national particularism which boosted his support. We already know right wings supported him, but as he addressed this stance it also gained a large number of support by the other conservatives. Moreover by using extreme language and criticizing specific targets; he was able to have a charismatic vibe with him, and managed to pull the impossible.