If you don't want to respond to him you don't have to but when you flag someone you stop everyone else from reading what he or she has to say. You are deciding what people can and cannot read.
Dr Julius made some serious points which are worth considering. This Pope whilst being a favourite of the media is one of the most controversial I have known and I have known 7. 
He has fired priests from the CDF with no explanation, he has destroyed a flourishing religious order, he has steadfastly refused to clarify doubts about Amoris Laetitia, he is continually berating ordinary Catholics who follow the 'rules'. His Secretary of State's meddling has wreaked havoc in the Order of Malta where a massive, financial scandal is now brewing over €30 million paid into the Vatican Bank immediately after the Pope dismissed Grand Master Festing.
It is only right that such serious matters should be made public and not suppressed (flagged).