This question can't be answered since Hinduism has no church. However, if this is a question about how a King should behave towards his subjects then it can be answered.
King must not be a tyrant
O king, thou shalt not swerve from virtue. Those men only, O
Yudhishthira, whose practices resemble those of robbers, cause a king
by their counsels to take to a career of war and victory. That king
who, guided by considerations of place and time and moved by an
understanding dependent on the scriptures, pardons even a number of
robbers, incurs no sin. That king who, realising his tribute of a
sixth, doth not protect his kingdom, taketh a fourth part of the sins
of his kingdom. Listen also to that by which a king may not swerve
from virtue. By transgressing the scriptures (one incurs sin), while
by obeying them one may live fearlessly. That king who, guided by an
understanding based upon the scriptures and disregarding lust and
wrath, behaves impartially, like a father, towards all his subjects,
never incurs sin. O thou of great splendour, if a king, afflicted by
destiny, fails to accomplish an act which he should, such failure
would not be called a trespass. By force and policy should the king
put down his foes. He must not suffer sin to be perpetrated in his
kingdom but should cause virtue to be practised. Brave men, those that
are respectable in their practices, they that are virtuous in their
acts, they that are possessed of learning, O Yudhishthira, Brahmanas
conversant with Vedic texts and rites, and men of wealth, should
especially be protected. In determining suits and accomplishing
religious acts, they that are possessed of great learning should alone
be employed. A prudent king will never repose his confidence upon one
individual, however accomplished. That king who does not protect his
subjects, whose passions are ungovernable, who is full of vanity, who
is stained with haughtiness and malice, incurs sin and earns the
reproach of tyranny. If the subjects of a king, O monarch, waste away
from want of protection and are afflicted by the gods and ground down
by robbers, the sin of all this stains the king himself. There is no
sin, O Yudhishthira, in doing an act with heartiness, after full
deliberation, and consultation with men capable of offering good
advice. Our tasks fail or succeed through destiny. If exertion,
however, be applied, sin would not touch the king.
Mahabharata Santi Parva Section XXIV
Maintenance of Social Harmony duty of a King
"Vyasa said, 'O thou of eyes like lotus petals, the protection of
subjects is the duty of kings. Those men that are always observant of
duty regard duty to be all powerful. Do thou, therefore, O king, walk
in the steps of thy ancestors. With. Brahmanas, penances are a duty.
This is the eternal ordinance of the Vedas. Penances, therefore, O
bull of Bharata's race, constitute the eternal duty of Brahmanas. A
Kshatriya is the protector of all persons in respect of their duties.
That man who, addicted to earthly possessions, transgresses
wholesome restraints, that offender against social harmony, should be
chastised with a strong hand. That insensate person who seeks to
transgress authority, be he an attendant, a son, or even a saint,
indeed,--all men of such sinful nature, should by every means be
chastised or even killed. That king who conducts himself otherwise
incurs sin. He who does not protect morality when it is being
disregarded is himself a trespasser against morality. The Kauravas
were trespassers against morality. They have, with their followers,
been slain by thee. Thou hast been observant of the duties of thy own
order. Why then, O son of Pandu, dost thou indulge in such grief? The
king should slay those that deserve death, make gifts to persons
deserving of charity, and protect his subjects according to the
Mahabharata Santi Parva Section XXXII
A tyranical King should be overthrown
For fear of anarchy, Vena was made king, though he was not fit for it.
Now that king himself has become the source of fear for the people.
How can we secure the good of all beings?
Srimad Bhagavata Purana IV.14.9
A King will attain to joy in this world and the next, if he protects
his subjects from oppressive officers and thieves, and collects taxes
in accordance with the scriptural law.
Srimad Bhagavata Purana IV.14.17
Vena said: In the king is present all the Devas like Vishnu, Siva,
Brahma, Indra, Soma, Agni, Varuna and all others who are supposed to
bless and punish mortals. In fact, the king is the embodiment of all
the Devas. Therefore, O Brahmanas, without further ado, offer your
worship to me, the King. Pay my taxes without stinginess. Who is there
to be adored other than myself?
Srimad Bhagavata Purana IV.14.26-28
When the Rishis were moreover insulted by the pretentious scholarship
of Vena, and when they found that their noble prayer for the welfare
of the world as a whole was rejected, their anger was aroused, and
they said: Let him be destroyed, let him perish. He is by nature a
perverted monster. To let him live is to allow the worlds to be
reduced to ashes. An evil person like him deserves not to sit on the
Srimad Bhagavata Purana IV.14.30-32
King gets merits or demerits
The King derives his highest good by protecting his people. A King who
protects his people well, will derive one-sixth of the merits of his
subjects in the life hereafter. But a King who collects taxes from
people without administering their affairs properly, will lose all the
merits to his credit and will inherit the sins of his people to boot.
Srimad Bhagavata Purana iV.20.14
Finally there is the issue of how people not belonging to the King's spiritual community should be treated.
The answer to that is given by the shloka given below.
If a holy act is against the interest of other members of the society,
it should not be practiced. It is Dharma which is the source of Artha
and even of Kama.
Kurma Purana I.2.54
The King should not favor his own spiritual system and not do anything that harms the interest of people belonging to other spiritual systems.