I can't prove that these are somehow connected to funding from Israel, but it seemed like these billboards were ready to go at a moment's notice.
As far as why we deem foreign propaganda as acceptable, I like to think that we play dumb about it in part so we can strategically point it out when it is in the favor of politicians and/or elites. Remember how Russian propaganda supposedly got Trump elected even though it was going on during prior years when the establishment insisted on the integrity of the elections? On the other hand, maybe we are just dumb.