Hamas is a designated terrorist organisation. And Israel is a powerful country with a proper democratic government. This is why Israel should use its powers responsibly. Some communal begets are very offended by such statements. On one hand there are people who want complete eradication of Palestine. They celebrate the attacks on Palestine.
Saying that none of them should survive. Without thinking about the common Palestinians and what they go through. On the other hand, there are comminal people celebrating Hamas terrorists. They are happy to see Israel being attacked. They want Israel to be destroyed. And that Israel should not exist as a country.
When you come across such comments on social media, remember that you are a human being, not a vampire thirsty for blood. War-mongering is very easy when you are sitting far away. But think about it, if you were in the midst of this war, think about what the ordinary Israeli and Palestinian families are going through. For life to come to a halt. And to live in fear that a rocket might hit your building at any moment.