Trump tends to attack others for the slightest percieved slight. Once confronted face to face, however, he tends to became rather tame in approach (to put butt kissing lightly) and drops the hissy fits.
Only those he sees as an unrelenting, definite and immediate threat to his 'power' or representing a group of such (such as Mueller, Pelosi, Schiff, Biden, and his eternal nemesis, Hillary) are dealt his Twitter ire. But even with those in person he's all handshakes.
Trump is classic Image vs Reality.