The controversial south-east Victorian based councillor criticised federal MP Darren Chester after he announced his support of same-sex marriage.
Lawyers for Mr Chester have asked Cr Sindt to apologise and retract what they describe as divisive, offensive and defamatory comments.
A vilification complaint has also been lodged against Cr Sindt by a New South Wales anti-discrimination campaigner.
A panel will decide if Cr Sindt has breached the councillor code of conduct by posting anti-Islamic material on Facebook.
She said threats from lawyers would not force her to censor her public comments.
“Same-sex marriage has a lot of, there’s a lot of robust debate around same-sex marriage and this morning I received some private and confidential correspondence from a lawyer,” she said.
“Will I think about what I say and do to be sure that the thought police are happy with it?
“I do not comply with the thought police. I am a free-thinking person.”