There's no need for an opinion from me: it depends where on your Christian journey you are. And it has nothing to do with what they deserve. What we all deserve is the very thing Jesus died so horribly, after being whipped and everything, to set us free from. Someone within a faith tradition as yet unredeemed lacks His words to guide them. In Judaism for instance, respect would be shown as required by God right up to the point where they bring home one of those excessively gem-encrusted idols with 14 arms and start offering it food at mealtimes. Yuk!
Like, it can't actually eat so the food would just sit there and go rotten.
Constrained by The Law, what you should do then is clear. It's not the same as if you did it though. Jesus also taught how people should relate to one another, as has been mentioned. Christians leaving a false faith tradition behind, of whom there were multitudes, go through a transitional phase prompting Jesus to explain:
Luke 14:25-26 • And there went great multitudes with him: and he turned, and said unto them, If any man come to me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea, and his own life also, he cannot be my disciple.
Within that multitude there'd be people from not actually false traditions, but ones that had been neutered into meaninglessness, as well as currently, soon to be ex- and former idolators and/or even worse savages, which brings me to Todd and Richie. You will notice that Jesus omits one category: Husbands. Clearly when you marry you will regard your wife as Jesus commands. Imagine if in that multitude there was a Todd. (Or Richie.) Assuming they were already married, how should their future relationship be assessed? Neither is required to hate the other. Perhaps that's something you could discuss with them over afternoon cocktails.
In Christ.