What do the owners of the church want?
The Roman Catholic Archdiocese of Vienna owns it.
And the Vienna Archbishop Christoph Schönborn supports the asylum seekers and has no problems if they stay, because he said "the church always cares about people in need".
And he already visited them inside the Church and said that they did not "decry religious teachings and impend the practise of religion", like the FPÖ said.
If that's the case, then let them tear the church down if they want. The govt can wait outside and deport them as soon as they leave.