Nature would make sure that it would not affect the past, you can only do what is intended for you to do. If, perhaps, you were supposed to go into the past and put that technology there, then it was supposed to happen, otherwise it would not. You can only alter history the way history wants you to. Russian physicists and philosophers debated on this for quite some time.
You say you can bend natures will, but you really can't.
Ex: Nature will stop you from walking up walls. You just can't do it.
Oh yeah, and for the hitler remark a while back, that was a really stupid thing to say. Someone with little understanding of the topic would say something like that, and thats the problem with most people these days, learn what you're talking about before you say it. That is why there are people around who deny the holocaust (And I know your remark may have had nothing to do with it, but look towards the end of the war, and relations of the holocaust, and the German/Polish people, and tell me he was well loved), they do this because they don't know, and they just choose to believe in ignorance. Because sometimes, ignorance reallyt is bliss, if you're not man enough to stand up to the past then just keep quiet about it.