If a Muslim follows the Koran and is a "good Muslim" (meaning: obedient), then they want to lie to infidels, and wage war against infidels. Any infidel who will not submit to Islam deserves to die. All obedient Muslims believe this -- they are good Muslims.
If a Muslim has assimilated somewhat, and takes a more "modern" view, then perhaps they seek to coexist. They will worship in their mosques, the Jews will worship in their temples, the Christians in their churches. These Muslims might be considered "good" in the eyes of the West.
But a "good" Muslim is not a good Muslim.
I don't think there are any "good" Muslims. Because the people I would call "good", would not be considered to be Muslims by other Muslims. They may be "good", but they are not obedient to the Koran.
The offspring of “good” muslims can easily slip back into the obediant fold.