Neither do (target civilians) - Hamas hasn't got the wherewithal to do so,

Wrong Jim.
Hamas do.
Those people you call "resistance fighters" are defined as terrorists by Ireland, rest of EU and most democracies precisely because they do.

Their suicide bombers' preferred target is buses, preferably with schoolkids on board.
Their mortars target kibutzes.
Their indiscriminate missiles are aimed at population centres.
That is what they do.

Every dead Palestinian civilian is a propaganda disaster for Israel, so they try hard to avoid them.
Every dead civilian is a propaganda victory for Hamas, so.....