Rashi citing Targum Yonasan: The good that they have is hard to extract from their hands like thorns stuck in wool.

Radak: The good in them is like a Chedek (thorn); it pains everyone who touches it.

Malbim: Also the good one found among them is not good himself. He is like a Chedek (thorn) which is straight compared to the Mesuchah (fence and cover made from thorns). The thorn itself is bent greatly. When they make a fence from them, they bend them more, so the thorn is straight in comparison. So the best of them is crooked, just he is straight compared to his generation.

Rashi: The straightest of them is worse than Mesuchah of thorns, which is like "Haser Mesukaso" (Yeshayah 5:5, i.e. a thorn fence). Radak ? Mesuchah with a Samech is like with a Sin ? we find "Atah Sachta Va'ado" (Iyov 1:10), "Hineni Sach Tzli Es Darkech ba'Sirim" (Hoshe'a 2:8).

Radak citing Targum Yonasan: The truthful among them is worse than the dross of a fence.

Rashi: The day to which you hope for good. It will be "Pekudasecha".

Radak: The day of the false Nevi'im ? they cause you to anticipate [good]. They gave false promises to you. Now you will see the day, if it is good or bad!

Malbim: It is the day of punishments prepared for those who look for you, i.e. the nations that look forward to seeing your evil.

Radak, Malbim: Recompense for your sins. Malbim ? that day, when Eretz Yisrael's neighbors are punished, also Yisrael will be punished.

Rashi citing Targum Yonasan: Irvuleihun ¹ (Radak ? confusion of the false Nevi'im); this is like "Nevuchim Hem ba'Aretz" (Shemos 14:3).

Malbim: The entire nation, about which was said "l'Damim Ye'erovu" (2), will be confused.