To paraphrase: "The Houthis entered this war under the rather childish delusion that they were going to bomb everybody else and nobody was going to bomb them."
Maybe don't bomb people, and, failing that, don't be surprised when they bomb you back.
Funnier still how the headlines on certain publications work. Houthis bomb Israel, Israel bombs them back; headline is "Israel bombs Yemen in Escalation with Houthis".