In verse 2 God states that those who served other gods included Terah the father of Abraham, but in the next verse it states that Abraham was different. "But I took your father Abraham from beyond the Eurphrates..." (NET) The inference there is that the serving of other Gods by the fathers of Israel ended with Terah and that Abraham was not numbered among them.
I'm pinging some others to chime in on this one.
Thanks.
Marlowe
In a nutshell, the story goes that Abraham's father was idol maker. And one day, one of his carved idols fell into the fire and burned up. Abraham was aghast thinking how could this be a "god" when it is consumed by fire.
His dad wasn't moved. He said that was the way the "god" gave him warmth and allowed him to prepare his meat.
But Abraham, as the story goes, fell to his knees and asked God in prayer, if you really exist please reveal yourself to me.