Genuine Christians can identify false teaching when they come across it and they have a Holy Spirit given awareness of error especially in relation to the person of Jesus Christ. What you believe about Jesus Christ indicates whether you are really a believer or just a religious person. May God and His Spirit guide you into all truth.
1 John 2:18-23
18 Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.
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.
20 But ye have an unction from the Holy One, and ye know all things.
21 I have not written unto you because ye know not the truth, but because ye know it, and that no lie is of the truth.
22 Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.
23 Whosoever denieth the Son, the same hath not the Father: he that acknowledgeth the Son hath the Father also.