One of their traits

بسم الله الرحمن الرحيم

In The Name of Allah, The Most Merciful, The Bestower of Mercy.

Al-Allamah Salih Aala Ash-Shaikh, may Allah preserve him, stated:

As for Ikhwaan Al-Muslimeen, (a) what is most evident regarding their Dawah is that they conceal, disguise, fickle and get close to the one they believe will benefit them and not making known their true reality. Among them is one who mingles with some of the scholars and the Mashaayikh for a long time and he (i.e. the Scholar or Shaikh) knows not their reality. He (i.e. this hidden Ikhwaani) makes a statement but hides the opposite. He does not state all (his views, opinions etc).

Source: An excerpt from Al-Fatawaa Al-Muhimmah Fee Tabseer Al-Ummah. Page 180

(a)Read more about Ikhwaan Al-Muslimen on this link http://www.ikhwanis.com/articles/lwakzes-the-ikhwan-muslim-brotherhood-are-from-the-72-sects.cfm