When I say that Abraham was not an idol worshipper while he lived in UR, my pastor states that he was and quotes Joshua 24:2 from the ESV to justify his understanding.
The ESV states this: -
Whereas I use the NKJV and it states this: -

I would suggest that the better way of paraphrasing what God said in this verse would be: -
states the context of what was being conveyed by God clear.
Is my pastor right though?
The ESV states this: -
2 And Joshua said to all the people, “Thus says the LORD, the God of Israel, ‘Long ago, your fathers lived beyond the Euphrates, Terah, the father of Abraham and of Nahor; and they served other gods.
Whereas I use the NKJV and it states this: -
2 And Joshua said to all the people, “Thus says the Lord God of Israel: ‘Your fathers, including Terah, the father of Abraham and the father of Nahor, dwelt on the other side of the River in old times; and they served other gods.
The Bible Hub interlinear provides this information: -
I would suggest that the better way of paraphrasing what God said in this verse would be: -
'Your fathers dwelt on the other side of the River in old times; including Terah, (the father of Abraham and the father of Nahor), and they, {the fahters}, served other gods.
states the context of what was being conveyed by God clear.
Is my pastor right though?