Why does it say "va'Tizni El Bnei Mitzrayim"?
Radak: El is like Im (with).
Malbim: This refers to going to Egypt for help, in the days of Achaz.
Why are they called "Gidlei Basar"?
Rashi: Their male organs are big. Radak ? it is called Basar ? "Rar Besaro? Oh Hechtim Besaro" (Vayikra 15:3). It says about Egypt "Asher Besar Chamorim Besaram" (below, 23:20). The organ is big in those who lust for women.
Radak citing Targum Yonasan: They grow their flesh.
Radak (according to the Nimshal): You greatly lusted for the To'evah 1 of Egypt.
To'evah is abomination; "To'avas Mitzrayim" (Shemos 8:22) is their idolatry. (PF)
Did they increase idolatry to anger Hashem?
Malbim: Yes.
