What's the best way to argue against the "feels" based value systems (people saying "it feels wrong", "it just feels right")?

It seems like these types of value systems have become the most common arguments when discussing almost anything.<br>I agree that people should be able to have their own value systems, but when people only base all their opinions on these two phrases, then it makes it extremely difficult to have a conversation.<br><br>One time a friend of mine was discussing with another friend of mine the ethics of zoos. <br>My friend whose against zoos was listing all the reasons, the horrible conditions of some zoos and how keeping wild animals in captivity is unethical etc. <br>Then my other friend said "it just feels right".<br>My friend who was against zoos then asked "how can you ignore all the points I made?"<br>To which my friend who was for zoos "I can't explain it, it just feels right".<br><br>Then another time I was discussing with another friend the existence of God.<br>My friend was presenting points why God must exist, I was presenting why I think God doesn't exist.<br>Then out of nowhere my friend exclaimed "it just feels right".<br>Then I asked "how do you ignore all the points I made?" "you can't just solely base your opinions on feelings, right?"<br>Then my friend said "I can't explain it, it just feels right".<br>Then I told him "I don't care how something makes you feel, it's either true or it's not."<br><br>My friend then became upset at me for not listening to his feelings...<br><br>It feels like no matter what you say, no matter how much evidence you present, if someone decides "it feels right" or "it feels wrong", then that's it. They just start talking in circles, without ever actually engaging with whatever you said.<br><br>So what's the best way to argue against "it feels" value systems, or should you just avoid having any discussions like this?