The Horry one was a foul and I'm glad he got thrown out, the other two I don't think so. Especially the first one where Stoudemire complained so much about. If you watch it full speed, you never would ever think it was on purpose. I think it's a case of slo-mo lying in this case. It takes a half a second action and drags it out so that you imagine there is intention behind it. There's just no way someone could think/act that fast at regular speed. Watch the clip in regular speed, you never think there's any way that's intentional. I also don't think the knee to the crotch was intentional, as it's totally legal to pivot like that and guys do it ALL the time. Nash just happend to catch it unluckily in the crotch, and because of the previous hoopla, everyone assumed it was intentional. If Amare hadn't called the Spurs a dirty team before that happened, everyone would have chalked it up to an accident (which is what it was)
This is just another case of trying to make a story where there really isn't one, and generate interest for games. I don't really think the Spurs are any dirtier than any other team in the league. Watch the clip regular speed and try to forget your predjudice, would you assume it was intentional? I didn't when it saw it in the game, and rewatching it later didn't change my opinion. Players don't "think" in slo-mo.