Because MOST Christians think they can do everything... They make their own laws in different churches, for instance, in Catholic Church they worship Idols, Evangelical churches where they preach the about the good wealth (most popular in south america) they forbid against alcohol drinking, and so on... And they have a special desire in not obeying the 10 commandments and practising the 7 deadly Sins every single day...
Malachi 3:6 "For I am the LORD, I change not; therefore ye sons of Jacob are not consumed."
Deuteronomy 30:11-14 "For this commandment which I command thee this day, it is not hidden from thee, neither is it far off. It is not in heaven, that thou shouldest say, Who shall go up for us to heaven, and bring it unto us, that we may hear it, and do it? Neither is it beyond the sea, that thou shouldest say, Who shall go over the sea for us, and bring it unto us, that we may hear it, and do it? 14But the word is very nigh unto thee, in thy mouth, and in thy heart, that thou mayest do it."
Matthew 15International Children’s Bible (ICB)
Obey God’s Law Not Men’s
Mathew 15 "Then some Pharisees and teachers of the law came to Jesus from Jerusalem. They asked him, 2 “Why do your followers not obey the rules given to us by the great people who lived before us? Your followers don’t wash their hands before they eat!”
3 Jesus answered, “And why do you refuse to obey God’s command so that you can follow those rules you have?