A hypocrite has no good standing in the sight of God no matter how many, "Christian" people testify to his good character. A man that is not right in his house and in private is not right with God period.
If we would know how to identify a true Christian from the Word, then we would not have this confusion no matter how many in the "Christian" community approve of a man simply because of his external standing before men. see 1 Tim 3:5,John 13:35,Matt 6 on hypocrites, Eph 5, Col 3, and 1 Pet 3 on family life, 1 Tim 3:2
Furthermore, though the inability or unwillingess of others in such circles to see the truth about all this may cause frustration to you, nonetheless this should in no way affect your relationship or fellowship with God. You must not make the mistake of identifying the loving, righteous Lord with any circle that calls itself by His Name but misrepresents Him by doing the opposite of what He commands.
Bitterness must not be allowed to take root or fester in the life because the Lord remains the same loving and gracious God to all who continue to trust and abide in Him. Our confidence is that the Righteous Lord Who loves righteousness will judge the world in righteousness but will begin with judgement at His house; the believers. Ps 11:7, Acts 17:31, 1 Pet 4:17
Our duty is to distance ourselves from anyone who calls himself a brother but walks contrary to the doctrine of God; esp. when we have knowledge of his private life which is not in accordance with God's commandments. Pray for him but keep away so that his sin(s) do not cause you to stumble. 1 Cor 5:11, 2 Thess 3:6,15 The devil would like us to sin the same way others sin or else lead us into another group of sins such as bitterness,anger etc. all designed very craftily to move us away step by step from the Holy and Loving God and eventually depart from Him altogether. Let us be on guard, dear friend and hold fast to the Lord Jesus and pray in faith for repentance for the wayward and fast and pray if we can for the same.
To God be the glory who gives us the victory through the Lord Jesus Christ! Heb 3:12, 12:15. 2 Cor 2:11
Alliances with unbelievers is utterly prohibited in Scripture so we need to be discerning and reject what God rejects and cling onto what He highly esteems: brokeness, humility,self-sacrifice, love, faith etc.
We ought to judiciously use our time to listen, watch and follow only those like the Apostle Paul who said to only follow him as he followed Christ.