Brother,
On this forum you will get a wide variety of opinions concerning this matter and it usually evolves into a heated debate. There seems to be no other issue, besides women in ministry, that generates so much heat.....maybe that is why we have global warming? :-?
Anyhow, back to your question. Did you say he remarried in two weeks after he was divorced? and he calls himself a Christian? I am appalled.
Now to your reaction to this 'marriage'...I understand your dilemna and support your position. However, what I think matters nothing, it is what the Bible teaches us that matters.
It is dangerous to fellowship with anyone who professes to be a Christian but lives in open sin. The Bible clearly teaches us this. What happens is that it has a way of wearing down our convictions against this 'sin', whatever sin it may be. For example, I know of a lady who has a serious anger problem. She has alienated her family, goes into a rant, rage when displeased. But she can be so charming, so religious. People outside the family never see this side of her. One of the family members has chosen to be be a close friend to her. Now we discover she is just like her: A very angry person, not given to common sense, and if challenged will resort to anger to defend her unethical ideas. Anyhow, get the point?
God bless you brother. What you are dealing with is no fun and I trust you will listen to the Holy Spirit to give you direction in dealing with this issue. I am not aware the Scriptures give us a details on how to deal with it, so you must rely on inspiration froom the Holy Spirit...anything other then this will not do.
Blessings,
ginnyrose