If someone said drive-by shootings, dental jewelery and spousal abuse, or female genital mutilation and cutting off people's hands was "black culture", I wonder if they'd see how offensive and meaningless it is to generalize by skin colour. Probably not.
Don't fall into that trap. That's the response they want you to give, and it's just more negative energy.
Just stop and ask yourself 'does this person have the first fucking idea what they're talking about?'. The answer is inevitably 'no', and you'll see why they're not worth your engagement.
'Ha look at this dude getting all crabby over white culture' is one thing, but actually engaging with the statement is a total waste of time. I know I'm one to talk when I'm usually rabble-roused, but it's easier to give advice than to take it

Edit: just realised that I've 'lectured' you a couple of times on inconsequential stuff. Sorry man, I really don't know where that's coming from. Ignore my old-man ways.