What's the big hoo-ha about Molotov cocktails in Chile?

https://sg.finance.yahoo.com/news/chilean-police-officers-set-fire-093056778.html

Hong Kong protestors also use Molotov cocktails against HK police.  This act by HK protestors is defined as peaceful protests by foreign media in HK.

Please do not exaggerate the act in Chile when the same act is happening in HK because it is just part and parcel of peaceful protests.