They are zealously paying you court in order to win you over to their side. Affect, in this sense, is obsolete. It is from affectare, to strive after, earnestly desire. So Shaks. Tam. of Shr. I. i. 40:
“In brief, sir, study what you most affect.”
Ben Johnson, Alchem. iii. 2:
“Pray him aloud to name what dish he affects.”
As a noun, desire. So Chaucer, Troil. and Cress. iii. 1391:
“As Crassus dide for his affectis wronge” (his wrong desires).
Comp. 1Co 12:31; 1Co 14:1.
Not well (οὐ καλῶς)
Not in an honorable way.
Nay (ἀλλὰ)
So far from dealing honorably.
They would exclude you (ἐκκλεῖσαι ὑμᾶς θέλουσιν)
From other teachers who do not belong to their party - those of anti-Judaising views who formed the sounder part of the church.
That ye might affect them (ἵνα αὐτοὺς ζηλοῦτε)
So that in your isolation from others, you might be led to seek affiliation with them.