Aaq, rav belsky was very anti zionist and did not mean to downplay the shevuos; he said they’re real, and very important. And what he says fits into what the “derech moshol” might mean in the iggeres, but in no way has any authority ever said that the shevuos just don’t matter, or we can disregard them because they’re “just agadeta”, again, whatever that means.
Mdd, the elements of satmar shitah that are a minority opinion are his(and basically all other Hungarian poskim) stance on voting and taking money from the state(in this he is joined by bais brisk). In all other ways, rav Reuvain grozovsky, of agudah, famously wrote that there’s really no difference between satmar and the rest of the torah world. The difference is mainly in those 2 practical issues.
Satmar also spends more time on zionism than other groups; others don’t regard it any differently than reform, or any other “ism” – in this, there’s a mixed bag… Every circle of klal yisroel has its things that it emphasizes more… Satmar holds very strongly about spending time on zionism.