I would hope that, in a paper as respected as The TES, that was not your intention. Parents, church schools and courts generally behave in a just way. I hope you are not mistaking diversity for unfairness. Our school system is richly diverse and church schools have played a valued part in its development.
You say "many church schools have maintained restrictive admissions policies that display little Christian charity". Not all church schools are innocent of that charge but I hope that your use of the word "many" was not a device to imply "majority". The majority of church schools do operate admission procedures in a manner that is fair and consistent with their beliefs.
J Hughes Headteacher English Martyrs School and Sixth Form College, Catcote Road, Hartlepool