Oh, because you say so, that's it, whether she is right or wrong, he has to give it to her!
Look, I did not read the Post article but I do not know how you decide what is right and wrong in other people's fights. Even if you read some article printed somewhere, does that make you sure you know both sides?
I have no idea what justification or rationalization he has but it is not up to me or my imagination. That is irrelevant. Do you disagree?
If she is right, we agree.
If she is wrong, but begging for 3 years to divorce, they grew apart, they have no bonding anymore except for being called married, then yes, he should not keep her hostage.
The only reason I see maybe as justified, is if she is somehow managing to destroy him completely, and where its clearly unjustified* (say, she is crazy, filthy rich, tons of lawyers, and he is just a regular guy getting e.g. barred entry to the country where the kids reside, etc) .
*I know you/people will start nudging about what means unjustified. e.g. nice husband and nice wife don't get along, and as soon as the divorce starts, somehow, he supposedly turns into a pedophile, etc etc, and battling the ugly way without boundaries.
Yes, every war is ugly, but there is a war for justice, and there is a war for the sake of waging a war, not focused on winning, but on burying the other one, preferably alive.