That is an interesting question, and a significant one.
Shortly after 9.11, voices on sites like Vanguard News Network (run by the Nazi Alex Linder) began making statements like "You wouldn't want one of these Arab fellow to marry your daughter, but you have to respect anyone who have the guts to crash airplanes into buildings full of Jews". Almost immediately, most other Nazi sites took up the theme, some very loudly, some not so overtly. But by February 2002, most of them linked to at least one Jihad or PLO site. And on several Nazi forums (Polinco being an example) Nazi "intellectuals" were calling for a program of cooperation with Radical Islam against "the common enemy".
Do a search on nazi, and you will find more recent stuff about how Arafats 'uncle' went to nazi Germany to meet his idol Hitler. Arafat's 'uncle', the grand mufti of Jerusalem, wanted Hitlers Endlosung to be unleashed over his area.
The protest in the Netherlands makes clear they see the Jews as a common enemy.
I also heard there was an Arabic part on a neo-nazi forum. I thought I was Polinco, but I cannot find it. The Dutch version of Polinco also has got a lot of muslim posters.