They already have called it "antisemitic terrorism" even though the attacker turned himself in to building security right after.
Considering the victims are rumored to be an engaged couple and the perpetrator been seen waiting, I'm thinking a more personal motive like jealousy, or a specific case, rather than racism.
Think the spotlight on them after the Adjuster, means the government can't afford not to go after them for more unscrupulous shit. Otherwise, they'll be seen defending UHC and give more fuel to the argument Luigi's trial is rigged and he's just a patsy.