You can always cite Numbers 5.... Christians rarely read the bible... Also tell them it doesn't matter what their opinion is if they hate abortion don't have one. Also refer them to the founding fathers like Thomas Jefferson and John Jay both of whom refused to sign off on either the articles of confederation unless they separated church and state (used before the constitution) and the constitution itself... Jefferson was the guy who used his razor to remove the superstitious crap from the bible and John Jay was a bible literalist​ preacher ...
"The Test for an Unfaithful Wife

11 Then the Lord said to Moses, 12 “Speak to the Israelites and say to them: ‘If a man’s wife goes astray and is unfaithful to him 13 so that another man has sexual relations with her, and this is hidden from her husband and her impurity is undetected (since there is no witness against her and she has not been caught in the act), 14 and if feelings of jealousy come over her husband and he suspects his wife and she is impure—or if he is jealous and suspects her even though she is not impure— 15 then he is to take his wife to the priest. He must also take an offering of a tenth of an ephah[c] of barley flour on her behalf. He must not pour olive oil on it or put incense on it, because it is a grain offering for jealousy, a reminder-offering to draw attention to wrongdoing.

16 “‘The priest shall bring her and have her stand before the Lord. 17 Then he shall take some holy water in a clay jar and put some dust from the tabernacle floor into the water. 18 After the priest has had the woman stand before the Lord, he shall loosen her hair and place in her hands the reminder-offering, the grain offering for jealousy, while he himself holds the bitter water that brings a curse. 19 Then the priest shall put the woman under oath and say to her, “If no other man has had sexual relations with you and you have not gone astray and become impure while married to your husband, may this bitter water that brings a curse not harm you. 20 But if you have gone astray while married to your husband and you have made yourself impure by having sexual relations with a man other than your husband”— 21 here the priest is to put the woman under this curse—“may the Lord cause you to become a curse[d] among your people when he makes your womb miscarry and your abdomen swell. 22 May this water that brings a curse enter your body so that your abdomen swells or your womb miscarries.”

“‘Then the woman is to say, “Amen. So be it.”

23 “‘The priest is to write these curses on a scroll and then wash them off into the bitter water. 24 He shall make the woman drink the bitter water that brings a curse, and this water that brings a curse and causes bitter suffering will enter her. 25 The priest is to take from her hands the grain offering for jealousy, wave it before the Lord and bring it to the altar. 26 The priest is then to take a handful of the grain offering as a memorial[e] offering and burn it on the altar; after that, he is to have the woman drink the water. 27 If she has made herself impure and been unfaithful to her husband, this will be the result: When she is made to drink the water that brings a curse and causes bitter suffering, it will enter her, her abdomen will swell and her womb will miscarry, and she will become a curse. 28 If, however, the woman has not made herself impure, but is clean, she will be cleared of guilt and will be able to have children."

Ultimately all Christians have is the threat of eternal damnation, because if they are honest, they are all scared shitless of their imaginary friend, have crept so far up it's metaphysical arse they could not find there way out with a Davy lamp and a pick axe

It is the go-to phrase when a religious person is either tired of the topic or can't think of a better argument. I've always looked as 'can't think' -- unfortunately once these people get into power this will be a witch hunt country very quickly.

I avoid conversations with religious people. Some of my students and colleagues are religious (mostly ethnic Jews actually, but a few Catholics). We avoid certain topics. Everybody knows I'm not religous. I haven't hidden that fact.

No reasoning with forced birthers and gawd fanatics. They don't believe in science or facts or the laws as they are now written. I don't waste my time trying to talk to them anymore. You can't reason with stupid!!

Yeah, you're wasting your time. People today live in different universes. That(IMO) is the scary part. She probably gets all her news from Faux news and considers everything else as 'fake'. And thinks Trump is a "godly" and caring person.? Next time ask what color the sky is in her world, Lol...

Such people are ideologues. You cannot reason with them or have an open conversation.

I think one of (perhaps the?) most dangerous demographic we have in the USA is the fanatical straight evangelical white christian (and I assume that I hit the target with this person in your replies). You see these sorts of replies all the time - devoid of logic or science and utterly sure in their correctness.....

I applaud you on your patience, and the fact that you still attempt. Agreed, we need to be very concerned.