Do you agree with me on this fact about facebook?

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Some people want to be surrounded by people who think like them, so generally I see that a guy posts something on youtube, say some political stuff and then his like minded friends affirm him, and as soon as someone of an opposing thought comments, they start to attack him like a hungry pack of wolf, while keep on liking each others comments. I am fed up of this behavior, so much, that I no longer comment on facebook.