It's probable that I'll get a ban for this post, but here goes anyway (it's a forum and we're all adults, after all):
It seems that McGuire has twice now used the word spastic, or some diminutive of this.
Which is, these days, an offensive term.
If Josh Charnley's son has cerebral palsy, then McGuire has used an old-fashioned, now very pejorative, term to state a fact. It's not very nice by any stretch, and he deserves calling out on it.
If Josh Charnley's son doesn't have cerebral palsy, and is autistic as has been suggested, then McGuire has used an old-fashioned, pejorative term inaccurately. Again, it's not nice, and he deserves calling out on it.
In either scenario, Charnley appears to have taken offence at the word used by McGuire. Which is understandable, but this isn't a war crime FFS.
The capacity for people to be offended in this day and age seems to get greater almost by the minute.
Having said all this, McGuire has a fairly long rap sheet in the past, so it's not looking like he was a very sensible signing all told.