Trying not refrain from hating isn't easy when the one inflicting psychological agony or physical pain is gloating. We can try to pray for the person to be enlightened and come to an understanding of the Christian way.
In that manner we don't judge but leave it in God's hands.
It's only when we desire the person to be damned forever that we are sinning. To feel hurt and angry temporarily is normal. When to feel constantly hurt and angry is normal if the abuse us intense enough and constant. But if in moments of solace we pray for the ignorant or misled person then we are on the right path.
The Bible does describe what it calls unforgivable sin of those who voluntarily choose to Reject Christ's Ransom sacrifice even after having tasted the glory of it's saving power. For such the basis for forgiveness is described as being nullified and even their capacity for repentance as having been permanently shattered in some mysterious way.
Forgiveness does not include the Devil and his demons whom although seeing God face to face and having been once holy angels have chosen to take sides with Satan and resist until they are finally destroyed.
It does not include persons who sin against God's Holy Spirit by calling its manifestation Satanic as the Pharisees did when Jesus resurrected people from the dead, cured the lame, restored sight and expelled demons who fearfully acknowledged him as the Son of God who would ultimately destroy them. Such a sin is classified as unforgivable in the Bible and Christians are under no obligation to forgive that type of sin.
So the concept that EVERYTHING and EVERYONE is to be forgiven isn't a biblical one.
Mark 3:
28Truly I tell you, the sons of men will be forgiven all sins and blasphemies, as many as they utter. 29
But whoever blasphemes against the Holy Spirit will never be forgiven; he is guilty of eternal sin.” 30Jesus made this statement because they were claiming, “He has an unclean spirit.”…
Hebrews 10:26
If we deliberately go on sinning after we have received the knowledge of the truth, no further sacrifice for sins remains,
Hebrews-6-
4 For
it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
5 And have tasted the good word of God, and the powers of the world to come,
6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put
him to an open shame.