I'm assuming you're asking genuinely so I will answer. For context, I'm originally Israeli, but I only heard about this from this HN thread.

He was apparently on a podcast with a released hostage from Gaza. He was discussing targeted assassinations. One doesn't "target" an innocent person. He indeed said that we should target not only those that are an "immediate threat". I'm guessing he meant people who took part in October 7th's attack but are not currently fighting, for example prisoners of the hostage he was talking with.

Many in Israel thinks the US forced Israel to stops many of its operations in Gaza, and he was basically saying he thinks some operations should continue.

To clarify, I disagree with him, I'm glad IDF operations in Gaza largely stopped and I wish they stopped completely. I wish the best for ordinary citizens of Gaza and I am longing for the day Ben Gvir will be behind bars. But he did not say we should randomly kill 30-40 Palestinians per day. There is an armed conflict, and many people on both sides would unfortunately love to see tens of deaths on the other side per day, especially armed people.