I think that, if you replaced Hamas with the Israeli Govt and Israel with Palestine in the above statement, you will find a lot of people who will hold that view:
The Israeli Government was elected to power, and has used that power to wage war on Palestine. Palestine has every right to wipe out such a vile terrorist organisation.
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Fact: Hamas fires rockets at civilians in an attempt to kill innocent people.
Fact: Israel (rightly or wrongly) attacked Gaza and more specifically Hamas in an attempt to stop rocket attacks on her citizens. Every country has the right and duty to protect its citizens. The strategy and tactics of the Israeli government will always be questionable but it's simply ignorance to compare Israel to hamas.
Futhermore, Hamas does not represent the Palestinians as a whole, and therefore it is wrong to say that the current conflict is between Palestine and Israel