Why should we care about how other nations defend their borders from illegal immigrants?
We don’t even give a shit about our own borders, so why should be be bothered with what would be a great idea for our own border? The Saudis see their country as being sovereign territory and they have every right to defend it how they see fit.
Just like our country has leadership who will do absolutely nothing for our own borders. It’s not our business what the house of Saud does.