How indepth was your study? Did it cover what God was referring to in those passages when they were not calling on His name? Was it in relation to Ba'al?
As part of my studies were historical, Kings of Judah, Assyrian empire, Jerusalem falling to Babylon, Babylon falling to Persia, exiles beginning to return, ect ect, a big part of that study was to examine Isaiah's confrontation with King Ahaz ( 7: 3 ), King Herezkiah sending for him in times of great trouble, being commissioned as a Prophet ( it's hazy now in whose reign that was ).
My Tutor named him the " Royal Prophet " a Prophet who obviously had the ear of kings but a Prophet who exposes evil and emptiness.
Have to be honest and admit that when I started my studies in my early 40's, I was green. I knew barely nothing about the Old Testament at all and a shameful admission I know, but I saw then, no relevance at all to being a Christian today.
Always remember my tutor saying, " The Old Testament is the New Testament concealed and the New Testament is the Old Testament revealed " and I thought,,,, " yeah, right, just give me the history Lady "
( I adore history )
She started at basics with Genesis and oh boy did she proove a point about mans greed and how it's so relevant today and how it links in with Isaiah's efforts to expose emptiness.
Isaiah was used as a comparrison to show there is hope and comfort ( the example of the flood was used ) as the opening of it is the heart of the Gospel of salvation.
She also called him the " Evangelical Prophet " and to push her point home about the Old Testament being the New Testament concealed she taught that there was more of the Gospel in Isaiah than any other book in the Old Testament and Isaiah was being true to the meaning of his name " The Lord Saves "
But most of all she pushed home how Isaiah was a Prophet who emphasized the Holiness of God, that we don't start with man and his needs, we start with God and his Holiness and his grace.
I got into an indepth study ( outside of college hours ) with a young lad on the course concerning Isaiah 14:3-20 ( not sure of the title of my thread but I started one here on the subject of lucifer ) and I really got my teeth into it.
Maybe you would like to search that one out and understand my confusion ( after this young lad had pointed it out to me ) in saying, after an indepth study,,, " Whoooah, will the real star of the morning stand up please ! "
The Baal worship study revolved around the cycles of nature necessary for survival and prosperity in the ancient world, you know, lack of rain = baal was displeased ect, but also how they almost had a God for crisis and another God for everyday life.
Think it shows the danger of claiming good intentions as an excuse for worship especially if it runs contrary to God's word.
Maybe it shows that cults today are just an old book wrapped up in a nice shiny new cover ?
Never be overwhelmed by decisions, just consider the right ones and your options will be far fewer.