Good advice. I have had to cut myself off from a number of members of my own family for just these reasons. That is very hard to do, but it had to be done. Siblings of mine who continued to allow these same people to influence them paid a high price over the years in terms of the effects on their psyche.
There is little social support for those who take such actions, especially involving family members. We are all told that we "must" try to work things out. Certainly, one should at least try to do so. But if this is not possible, one must be willing to break from that which is poison.
Thanks for supporting those who take this difficult step.
This is really hard to do, but you did the right thing. Tomas