The pic is legit: it's from Ukraine

The pic is not timely - it was taken ca 2016 as part of the Crimea crisis of those times...

I suspect an apology may come from Kinzinger's office soon - like most other politicians, his twitter account is "administered" by staff, and not himself personally. (Same was true of Trump - and I defended him when Dems tried to make hay out of his tweets, although you could tell that Trump himself did write some of his own tweets - mostly the ones with speeling, grammur, and referee errors LOL)

Does that mean Kinsinger gets "off the hook"? No, but your claim that Twitter is flagging his post is off...