It appears the US is blocking many British Muslims from entering the US, often in arbitrary last-minute ways that cause unnecessary trouble and expense.

Blocking 10 family members from traveling because of an objection to their one relative is especially nasty, and gratuitous.

Because there is no way to find out in advance if you will be blocked in this way, British Muslims in general are afraid to buy tickets to the US.

It seems to me that the US should offer a way to ask, before buying tickets, "Will you allow me to fly there?" If the US responds that you can go, and blocks you later, it should compensate you for the costs of your flight and other preparations.

And it is unconscionable to block 11 people because of objections about one.