I agree that the general sense I get isn't so much that Americans (I'm Canadian, but have a lot of American friends) hate soccer, but that most of them are just indifferent towards it. Like with any sport, you'll get people who are wildly passionate about it one way or the other, but I think most of America just doesn't care.
Now, I love to stereotype Americans, but I don't think their apathy towards soccer has as much to do with their hatred for ties or their need for violence as it does the simple lack of exposure. Fucking NASCAR gets more airtime on US networks than soccer does, and that's just a bunch of guys driving in circles for hours. Sure, the World Cup is one thing, but that's the grand-poobah of soccer events. Being enthused by that or watching that doesn't count.
Canada has this problem too, but to a lesser degree. For example, I don't watch TV (I spend far too much time on the internet for TV) or read the paper, but off the top of my head, I could probably name every team in the NHL, half the teams in MLB, at least a quarter of the teams in the NBA, and a handful of teams in the NFL. That's just from what I catch in day-to-day life (and that's even despite the fact I HATE American football and basketball). If you asked me to name a soccer team, I'd probably stare at you and start guessing cities in England, like Liverpool.
The fact is on this side of the Atlantic, you really have to be looking for soccer to find it, which is not true of any of the other four sports I've talked about above.