The Shi'a teaching of 'taqiyya', is based on 'dissimulation for a worthy cause'.Such causes might include the safety of the individual or to help propagate the spread of Islam.
The Sunni view is that Shi'a doctrine of 'taqiyya' isn't in accordance with its acceptable use. They assert that Shi'as have been using taqiyya as a tool of deception, not to save their own lives, but to cause strife for the Sunnis and their political leadership (which was resented by Shi'as) and for conspiratorial implantation of their own minority faith among the mainstream Muslim faith. [Wikipedia]
Not really comparable with Christian teaching.
