It seems severing ties of kinship (family) is a serious issue. From Sunnah.com:

'Abdullah ibn 'Awfa reported that the Prophet, may Allah bless him and grant him peace, said

 

Mercy does not descend on a people when there is someone among them who severs ties of kinship

and from Islam Basics:

The person who breaks the ties of kinship will never enter Paradise.

Islam Q&A even quotes al-Ra’d 13:26:

And those who break the Covenant of Allaah, after its ratification, and sever that which Allaah has commanded to be joined (i.e., they sever the bond of kinship and are not good to their relatives), and work mischief in the land, on them is the curse (i.e., they will be far away from Allaah’s Mercy); And for them is the unhappy (evil) home (i.e., Hell).

Question: Is it still wrong to sever ties of kinship in the case of an abusive relative?

I'm thinking either physical or psychological abuse towards oneself or one's other family members (e.g. children). Would Allah be okay with severing contact with them?

The Islam Q&A page continues:

A man said to the Messenger of Allaah (peace and blessings of Allaah be upon him), “I have relatives with whom I try to keep in touch, but they cut me off. I treat them well, but they abuse me. I am patient and kind towards them, but they insult me.” The Prophet (peace and blessings of Allaah be upon him) said, “If you are as you say, then it is as if you are putting hot dust in their mouths. Allaah will continue to support you as long as you continue to do that.” (Reported by Muslim with commentary by al-Nawawi, 16/115).

It's unclear to me what the Prophet means. It's also not quite addressing my question (although it does show Allah has some leniency), as this man is attempting to maintain ties of kinship, whereas I'm asking about severing ties of kinship as the result of abuse.

It seems severing ties of kinship (family) is a serious issue. From Sunnah.com:

'Abdullah ibn 'Awfa reported that the Prophet, may Allah bless him and grant him peace, said

Mercy does not descend on a people when there is someone among them who severs ties of kinship

and from Islam Basics:

The person who breaks the ties of kinship will never enter Paradise.

Islam Q&A even quotes al-Ra’d 13:26:

And those who break the Covenant of Allaah, after its ratification, and sever that which Allaah has commanded to be joined (i.e., they sever the bond of kinship and are not good to their relatives), and work mischief in the land, on them is the curse (i.e., they will be far away from Allaah’s Mercy); And for them is the unhappy (evil) home (i.e., Hell).

Question: Is it still wrong to sever ties of kinship in the case of an abusive relative?

I'm thinking either physical or psychological abuse towards oneself or one's other family members (e.g. children). Would Allah be okay with severing contact with them?

The Islam Q&A page continues:

A man said to the Messenger of Allaah (peace and blessings of Allaah be upon him), “I have relatives with whom I try to keep in touch, but they cut me off. I treat them well, but they abuse me. I am patient and kind towards them, but they insult me.” The Prophet (peace and blessings of Allaah be upon him) said, “If you are as you say, then it is as if you are putting hot dust in their mouths. Allaah will continue to support you as long as you continue to do that.” (Reported by Muslim with commentary by al-Nawawi, 16/115).

It's unclear to me what the Prophet means. It's also not quite addressing my question (although it does show Allah has some leniency), as this man is attempting to maintain ties of kinship, whereas I'm asking about severing ties of kinship as the result of abuse.