@Romeo Fabulini,
You must keep in mind my friend, that the Jews were poised to be taken into captivity by the Babylonians as part of Gods judgement against them for the sins of idolatry and rebellion against him. The babylonian way of life was saturated with the worship of false gods, divination of the stars and Idolatry.
"Learn not the way of the nations ... the nations are dismayed ... the customs of the peoples are vanity ..." (Jeremiah 10:2-3). Could the admonition of this chapter be anything other than to aid the Jews in rejecting the idolatry of the Gentiles, such as that they would encounter in Babylon.
Jeremiah went on to say directly after your verse
6No one is like you, YHWH; you are great, and your name is mighty in power.
So by contrasting the idols with God he admonished the Jews to give up their affection for their idols, which they had held onto from the days of Mannasseh, and to cling to God, who would save them out of captivity after 70 years.
I have been wrong before my friend and please do not hesitate to show me where I am, but to use the verse to suggest that idolatry is harmless, when in context it was one of the key reasons they were being taken into captivity in the first place, could be considered a stretch.