You don't believe me? Those who are immersed in islamist ideology think quite differently from people of christian heritage (even if they're not christian themselves, but they inherit a set of values). For the islamists, self-sacrifice if a good thing if done for a holy cause. That's what motivated the plane terrorists from 9/11: their religion made them believe that what they were doing was just. And as a reward, they'd have the company of multiple virgins in paradise.
In the western countries, due to the inherited christain values, people value life and reject self-sacrifice. Suicide is considered a sin, because the person is throwing away the body given by God, which is a holy thing. That's why the USA and other west-aligned countries pressure Israel to preserve the life of innocent Gazans: that's what best aligns with their moral values. If a bank is being robbed with the use of hostages, the police will do its best to preserve the life of the innocent, even negotiate with the robbers if necessary.
That's a way of thinking that's the polar opposite of the muslims. For them, if the cause is holy, self-sacrifice is allowed and encouraged. They're indoctrinated in these values since they're children. What the Hamas is doing is exploiting the western values for their benefit. That's why they took hostages, because they knew it would be a huge leverage against Israel. And that's why they're always flaunting the number of casualities (which are obviously inflated, because it helps their goals), in an attempt to reach the western countries' moral values and turn it into pressure for Isreal accept an indefinite ceasefire agreement, even a bad one.
Consider this: if the roles were reversed: Gaza had immense millitary strenght and Israel was the poor country, the Gazans would invade Isreal in a heartbeat and would care much less about Isrealli innocent civilians: for them the cause is holy, so it is justified to kill indiscriminately.