Harassed in Westlandgracht

I was in Westlandgracht tram station Amsterdam with my gf today around 4pm. We are asian. Two guys threw a can of redbull at us (hit my gf face) and my gf threw it back at them. Suddenly they started coming at us and aggressively asked us regarding on why we threw the can at them?? They started harassed us afterwards, shouting “do you want to fight?” and asking for money. They even shout at us “Filipino! Filipino! Go away!” (We’re not even Filipino).

Wtf is going on? how likely this to be happening in Amsterdam? On a bright sunny day? Are these some kind of racism or just idiots messing around? I lived in the UK for almost two years (London & Leeds) and this has never happened to me there, even after a very late night out. Today is my fourth day in Amsterdam and I’m very surprised that this was happening to me.

Sorry for my bad english.