chapotraphouse

If you dislike them then why do you care?

On the grand scale: no, you're just acknowledging someone who was doing bad shit as part of a bad system got what was coming for them in a karma sense.

On an interpersonal scale: generally mocking the death of a family member is frowned upon by that person's family. so if they didn't already dislike you back, they probably do now.

Sometimes the "right" thing doesn't need to be said, if you know what I mean. And saying things, even if true, has a right and wrony timing that will determine if you're the asshole in life.

Also, in context, did this person know why you said womp womp? As in did they know you were saying like "he was doing shit. I don't care."? or did they have no context and so assumed you were just mocking the death of their uncle generally just to be mean. If they don't know your politics, which are not all that common in the US (assuming US due to this situation), or they're most braindeads who never think like "gee, why was my uncle in a foreign country across the world?" I have to assume they're either a chud who thinks that him dying there is heroic or someone who is mostly neutral but finds mocking their uncle distasteful. Most Americans probably very genuinely seriously would not understand (until it's explained then maybe they get it- but people seriously go without thinking about shit their entire lives) why the uncle deserves, to whatever degree, mockery and definitely not reverence. People can't even grasp why Palestinians might fight and kill Israelis. The Iraqis are pretty much similarly dehumanized to US but it's US soliders getting killed, so there's another layer to digging past the BS "they're terrorists!" stuff.

So perhaps you should womp womp and then when they get pissed you lecture and educate them on imperialism. One day, perhaps, you will womp womp their uncle together.