[ichabod1]

I wonder whether if it is permissible to say "Mohammed was a pig" to a Dhimmi in order to smoke out an infidel.

That would be a good question for Ask the Imam, but I ain't posting there.

[Fred Nerks]

Well...I guess the imam might say...It's OK as long as you don't believe it yourself and it exposes the infidel so you can kill him, peace and blessings upon you and allah knows best...

[SauronOfMordor]

I wonder whether if it is permissible to say "Mohammed was a pig" to a Dhimmi in order to smoke out an infidel.

From the Muslim Sunnah Volume 4, Book 52, Number 271:

Narrated Jabir:

The Prophet said, "Who is ready to kill Ka'b bin Ashraf (i.e. a Jew)." Muhammad bin Maslama replied, "Do you like me to kill him?" The Prophet replied in the affirmative. Muhammad bin Maslama said, "Then allow me to say what I like." The Prophet replied, "I do (i.e. allow you)." [ie, it’s OK to use lies and deception to get close to an enemy you want to kill]

At the link are the collected quotes on how to conduct Jihaad