They make ornaments out of it and put it over bosom, entrance, over churches and on weapons. Christ never told to worship anything, not even himself, but follow his principles.
But lazy humanity seeks easy religion of idolatry. So they will make idol of anything connected to God or a sage. Cross is not Christ’s attribute but applied to him by our malice, which Christ submitted to bring us to repentance by moral influence. But repentance evading humanity readily evades and forgets that. So the sign and memory of cross no longer brings them to repentance. Rather they glorify it instead of glorifying Christ’s love which overcame our inflicted cross.
So when we adore cross we crucify him again.