How much Copts trust the Brotherhood

Not at all:

A poll conducted by the Egyptian Union of Human Rights Organizations, led by Coptic activist Naguib Gobrail, suggests that a majority of Copts support Amr Moussa for the presidency.
The sample consisted of 3000 Copts.

Moussa received 78 percent of votes in the poll, while Islamist candidate Abdel Moneim Abouel Fotouh got 22 percent, Gobrail said. The Muslim Brotherhood’s candidate, Khairat al-Shater, and Salafi-oriented candidate Hazem Salah Abou Ismail both got zero votes.

 Not bad for Aboul Fotouh though.