I think that CMA churches run the gambit from Charismatic to "almost" forbidding it although they're not allowed to forbid "gifts" including tongues (1st Corinthians 14:39 tells us, "do not forbid to speak in tongues," which the CMA takes literally).

I agree that Arminianism and Pentecostalism are more than "minor" matters. Both assault God's sovereignty and hold human effort as effective for salvation and sanctification.

-R