What about those Jewish Holidays?
One issue that keeps popping up is the issue of Biblical Holidays. People have become accustomed to calling them the Jewish Feasts.
God calls them His Holy days.
Have you ever studied them. I found this good video from 119 Ministries. They have hours upon hours of top quality video teachings.
Here is a study of Isaiah 1:14. Learn the issue at hand in the proclamation regarding "your new moons and your appointed times."
Whose times do you observe?