The problem in the church is not that "too many" people think salvation is earned, but rather that grace means they are relieved of any responsibility to produce the fruit of the kingdom.
Being responsible to produce fruit in keeping with faith in Christ does not mean salvation is by works. It means if you have the Holy Spirit in you in salvation you are a changed person and so by virtue of having the Spirit you are expected to have a changed/changing life or else you are simply showing yourself to not have the Holy Spirit in you in salvation.
Which verse exactly?
Here is the revelant verses. I use NIV for normal reading and AMPC for study since it gives all of the meanings of the original language words. Note the ones objecting are using works for salvation not grace.
Matthew 7
NIV
True and False Disciples
21 “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven. 22 Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name and in your name drive out demons and in your name perform many miracles?’ 23 Then I will tell them plainly, ‘I never knew you. Away from me, you evildoers!’
The Wise and Foolish Builders
24 “Therefore everyone who hears these words of mine and puts them into practice is like a wise man who built his house on the rock. 25 The rain came down, the streams rose, and the winds blew and beat against that house; yet it did not fall, because it had its foundation on the rock. 26 But everyone who hears these words of mine and does not put them into practice is like a foolish man who built his house on sand. 27 The rain came down, the streams rose, and the winds blew and beat against that house, and it fell with a great crash.”
AMPC
21 Not everyone who says to Me, Lord, Lord, will enter the kingdom of heaven, but he who does the will of My Father Who is in heaven.
22 Many will say to Me on that day, Lord, Lord, have we not prophesied in Your name and driven out demons in Your name and done many mighty works in Your name?
23 And then I will say to them openly (publicly), I never knew you; depart from Me, you who act wickedly [disregarding My commands].
24 So everyone who hears these words of Mine and acts upon them [obeying them] will be like a [p]sensible (prudent, practical, wise) man who built his house upon the rock.
25 And the rain fell and the floods came and the winds blew and beat against that house; yet it did not fall, because it had been founded on the rock.
26 And everyone who hears these words of Mine and does not do them will be like a stupid (foolish) man who built his house upon the sand.
27 And the rain fell and the floods came and the winds blew and beat against that house, and it fell—and great and complete was the fall of it.
True and False Disciples
21 “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven. 22 Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name and in your name drive out demons and in your name perform many miracles?’ 23 Then I will tell them plainly, ‘I never knew you. Away from me, you evildoers!’
The Wise and Foolish Builders
24 “Therefore everyone who hears these words of mine and puts them into practice is like a wise man who built his house on the rock. 25 The rain came down, the streams rose, and the winds blew and beat against that house; yet it did not fall, because it had its foundation on the rock. 26 But everyone who hears these words of mine and does not put them into practice is like a foolish man who built his house on sand. 27 The rain came down, the streams rose, and the winds blew and beat against that house, and it fell with a great crash.”