My father is from the region of Satmar. He is now 82 and still remembers R' Yoilish bribing the regional governor to ban B'nei Akivah.
Many of the local Rebbeim went with their people to the camps and comforted them, supported them, until the very end.
[Rabbi Yoel] Teitelbaum [the Satmar Rebbe] was spirited off to Switzerland by the very Zionists he so despised.
After 46 years of, unfortunately, having dealings with the Satmar community my general impression has been that they are often ignorant, hateful and despise other Jews tremendously. Those that are more tolerant and decent among them are often forced to keep their views closeted so they don't suffer derision and loss of livelihood.
The one thing they sure can't be compared to is: Amish.