How can I address this problem without being harsh?

Hi, so I’ve been dating this guy for about a month now and I enjoy our Connection however he does this thing that comes across tone deaf and ignorant I’d like to nip this in the bud early on so I don’t face these issues in the long haul.

I’ll make this short the other day we were on the phone chatting about a case that I came across (the Chris watts case) I explained to him that Chris annihilated his entire family (went into detail) and I said “This is one of the sickest cases I’ve come across I can’t believe someone could off their entire family with no remorse” he proceeded to say “yeah that’s sad, but you know what hats even sadder when Obama nuked an entire hospital in the Middle East”

Okay I get it that’s terrible but he does this thing where everything is a competition and two things can be wrong at the same time it doesn’t or shouldn’t minimize the other. It’s driving me nuts because he constantly does it I’ll bring up something that’s heartbreaking and he’ll be like “yeah but what’s going on in Gaza is even sadder” NO ONE SAID IT ISNT

How can I tell him that how he comes across on certain issues is overbearing, it’s like having a d*ck swinging contest with him or like he’s trying to prove something.