[thombat]

The whole sentence is self-explanatory:

> One asked a technical question about my lib, I answered "do you know what's happening in Ukraine right now?" - no reply.

Innocently asking the question seems fine; as you say we generally don't know the personal circumstances of online contacts. But once appraised of it a quick reply would be human, at least to the effect of "good luck, keep as safe as possible & please ignore my question until happier times are restored"