If you're from another country just being exposed to American media and not familiar with why that media is the way it is, it may seem like this hate and racism thing wasn't around as much before and is around more now. Unfortunately, if you are familiar with American history or have spent any time in a predominately conservative area, none of what you mentioned is anything new or even at higher levels than it has ever been. Almost all these hateful bigots have been that way for their entire lives. Politicians are just directly pandering to them now since Trump proved it wouldn't destroy your political career when you are totally open about demagoguery rather than dogwhistling like right wingers used to think they had to do.