Why Do People Debate Scripture in a One-Sided Manner?

Why Do People Debate Scripture in a One-Sided Manner? We talk about how people like to debate the side they prefer BUT they tend to avoid listening to opposite view points EVEN WHEN PEOPLE ARE READING FROM THE SAME RELIGIOUS SCRIPTURES! We did not get into discussing how or why people do this? But examples of why people do this. For example: In Christianity, it is very common that most denominations do not follow the Jewish Laws. Those who do follow the 10 Commandments, including observance of the Jewish Sabbath times, will often avoid the verses that state the Commandments do not need to be followed. Those who keep some dietary laws (such as the laws about avoiding unclean meats) may follow those laws, may also keep the Commandments, but they then avoid all of the other religious laws. Such as keeping the Jewish Holy Day holidays. They might observe Sabbath, and not keep those other days holy. There appears to often be discrepancies and picking and choosing. This is one reason why I liked the Messianic Jewish Congregations. They tend to at least try and follow all the Jewish laws and the Commandments. But Jews also do not follow all of the Commandments. For example, the Commandments about sacrificing animals, it is not common for modern Jews to do this. I believe (maybe) it has something to do with the temple not being available, and the Most Holy Place not being available (don't quote me on any of this, but I was told Al Aqsa Mosque is on top of the area where the Most Holy Place should be and where the temple would need to be, and therefore they don't do ritual sacrifices anymore, because there are laws around how to properly perform the rituals and they are unable to do this in the correct location).