Nope! Nowhere does it indicate that they were believers, in fact, Paul on more than one occasion ran into problems with this group.
Scripture DOES indicate that there were Pharisee's in this meeting who were believers.
15:1 Tells us that the debate is over WHO can be saved.
The men from Judea and those Pharisee's who BELIEVED agreed that the gentile must first be circumcised and then walking in Torah. If you understand the Jewish mindset what they are saying is that a GENTILE can NOT be saved that only the Jew can be saved.
Or since it speaks these
certain men which had Pharisaic sectarian beliefs.
They said the exact same thing that the certain men which argued with Paul.
Lu 12:1 In the mean time, when there were gathered together an innumerable multitude of people, insomuch that they trode one upon another, he began to say unto his disciples first of all, Beware ye of the leaven of the Pharisees, which is hypocrisy.
1Co 5:8 Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.
*The certain men came from Judea
1Jo 2:19 They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out,
that they might be made manifest that they were not all of us.
*Until they went out, these were not manifest...
Persons were unaware of them....
Jude 1:4 For there are certain men
crept in unawares, who were before of old ordained to this condemnation, ungodly men, turning the grace of our God into lasciviousness, and denying the only Lord God, and our Lord Jesus Christ.
*They feasted with believers......
Jude 1:12 These are spots in your feasts of charity, when they feast with you, feeding
themselves without fear: clouds they are without water, carried about of winds; trees whose fruit withereth, without fruit, twice dead, plucked up by the roots;
These were
exposed when it came to the Gospel to the uncircumcision.....