Assertion: God of Israel changed his mind about Israel needing to drive out the nations in the Promised Land - ref. Judges 2 & 3
Some Bible believers interpret God (of Israel) saying, "I will not [anymore] drive them out before you," to mean that Israel didn't anymore need to drive out the nations living in the land promised to them.
This assertion [that God had changed his mind about Israel having to drive out the nations] is of course part of the arsenel of arguments used in attempts to justify giving the Arabs part of the Promised Land. When I first heard this argument, I immediately related it to Jesus' answer to Pharisees' (trick) question, Why did Moses say that a man could write out divorce papers and send his wife away? Obviously, Yeshua's answer reflected the fact that God doesn't change, that the problem lies with the wickedness of mankind:
Similarly, with "not [anymore] drive them out before you," God didn't change his mind, or the rules for controlling the playing field** (Promised Land). Actually, he added a handicap:
**The playing field (the Promised Land) was still their's, but they were just going to need to share it at their detriment; unless of course, they trusted God to help them to rid themselves of the "thorns in their side" (KJV). And thorns they were as we see in the historical records in the Bible. But the Bible does not just deal with the past, it also deals with the present, today, in the form of Arabs trying to be a nation in the land promised to the Jews, and the future when the nations will be judged for trying to divide their land.
The reason for Jehovah's ruling to remove other nations from the land where the Jews were to live, was that these nations serve foreign gods that don't offer true redemption from sin. Obviously Jehovah would prefer his people not to be distracted from pursuing his, the only plan of salvation, by other god's false promises - like 72 virgins for martyrs, etc. It is as if Jehovah invented a game, called REDEMPTION, developed rules for this game, and players, the Jews, to test the rules on before the game was introduced to the nations. Israel was to be the hometeam, with their own home stadium, the Promised Land, that is to be theirs permanently since Jehovah's Messiah will rule from there. He is central in the plan of redemption and took up the identity of the home team, the Jews for his earthly identity. For that reason, his twelve disciples also came from that team and their names will be written on the twelve foundation stones of the New Jerusalem's wall, while the names of twelve tribes will be written on the twelve gates of the city. Revelation 21:13-14.
Other nations of the world come and go since only Israel was given a guarantee of permanent existence and a permanent domain, due to Messiah chosing to take up a Jewish identity on earth and eventually rule the nations from their domain when he returns.