I see why most people are enraged coz of this attack. I personally think they were not trying to kill her, bur to force her to acknowledge her mother so they can control her and marry off or whatever.
As reckless as her dad is, remember, he didn't attack wizard tower even knowing Estelle was there. Same here. If they had her hostage, plus her mom, plus official papers, he would have to think twice.
Buuuut, thx to her brother it all played out so they can just nuke the entire household)))