Well, lots of reading for me to catch up on!
Let me say firstly that I doubt there is a race/country in the world that is 'innocent' when it comes to making wars on others because they are different (even Jews, in the Bible (Joshua, specifically) the Children of Israel were commanded by God to wipe out the various tribes and nations living in then-Canaan). The plain fact is that hatred of Jews is something that has consistantly gone on through the years, from the Spanish Inquisition up to the Holocaust, and to see that in the music I love there are people who hate others because they are different (and trust me, most Jews ain't 'different'!). Why is it a valid argument to say that the NSBM groups are patriotic? How will removing all the Jews from your land make it better?
Yes, present day Israel is a troubling issue. This is not helped by the fact that a large percentage of the world media (including especially our own BBC) percieves the Palestinians as the underdogs and so reports in their favour.
I do not wholeheartedly (apart from the fact that people of my own race are being killed) support the Israelis-despite my religion- because the Israeli government has, since its conception in '48 used financial methods to try and destroy the minority of ultra-orthodox Jews in the country (eg by higher taxes on larger families, reducing funding for their schools, etc). This has largely gone unreported outside of Israel, and yet this causes a major split between Ultra- and not-so-Ultra orthodox types. So don't get me wrong, I cannot fully support the heavy-handedness of the Israeli government in the 'war'.
Yet I find it ridiculous to support the Palestinains, because of their methods (in all the years of Jewish oppression, there have been very few times when Jews have risen up against their tormentors. The Warsaw ghetto is one, yet in all the deathcamps why did they not mass-attack the guards??? They went like sheep to the slaughter), and to say that the Israeli conflict is worse than, say, Serbia in the 90's is wrong. To be blunt, if the Jews can put up with all the shit we've recieved from the world over the last 2000+ years (at least back to Ancient Roman times), the minor inconvenience of having a few terrorists weeded out of your midst (something that most Palestinians agree with - the terrorists in no way help the peaceful majority) is nothing. America in its various campaigns has killed many more innocents ('innocents' being people who aren't threatening your life) than Israel has. But to get to the point:
Yes, Cannibal Corpse etc are not serial killers, but the NSBM bands are anti-semitic, and this disturbs me. I don't think that I deserve it-I have never oppressed anyone in my life (don't tell me that they use Israel's treatment of the Palestininians as an excuse), and I honestly do not belive that 'goyim' (non-Jews) are animals. I have a lot of personal problems with my religion, yet I refuse to be classified differently because of it. I am a fan of extreme music, and it is a shame that just as I am broadening my interests into black metal I come up against this. Why listen to music if the makers of it hate you, or even pretend to? More practically, why listen to a band if at a live show, I will be a target of hatred??
I foresee much research in the coming months into bands to find their beliefs (much relieved about Amon Amarth!), and I appreciate that it is a small minority of the otherwise excellent BM world (any suggestions would be much appreciated-I'll try anything once(except obviously racist stuff!

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In conclusion, all I can do is say I appreciate all the points of argument that I read, and thanks to all for the chance for discussion.