Private Adi/Sissy
America is far too big, with far too few wizards compared to muggles to think they are all in danger. And there are many like our family who are not blood-obsessed. There aren't really enough pureblooded families who are. And Lady Nyx was defeated once before. Without her, this is just a flare-up is all.
As for Jackson and Vi, Jackson applied to school in London, so hopefully we'll be abroad for a couple of years while things settle down again. And you and Vi are safe here at Hogwarts for another year.