"...Contaminated with secular beliefs." - Churches in United States Becoming Pagan?

Do churches in other countries really send missionaries to the United States? Ken Ham speaks about that and writes about the pagan influence happening in our churches today.

https://answersingenesis.org/culture/america/missionaries-to-a-pagan-culture/

Verses for Consideration:

2 Corinthians 11:3 ESV

But I am afraid that as the serpent deceived Eve by his cunning, your thoughts will be led astray from a sincere and pure devotion to Christ.

Romans 16:17 ESV

I appeal to you, brothers, to watch out for those who cause divisions and create obstacles contrary to the doctrine that you have been taught; avoid them.