The Houthis have been keeping up their blockade for 8 months and have already been bombed by US coalition forces multiple times.
I don’t think they are at all surprised aside from the fact that it took Israel this long to do the exact same thing.
I keep seeing lots of “find out phase” comments on other threads which doesn’t make any sense because they’ve been effectively at war for years on end, and definitely with Israel for 8 months.
The more interesting notion is that Israel also probably bombed some residential areas unlike the US who were trying to destroy missile launch sites to end the blockade.