My wife (30F) struggles to have a positive relationship with my (30M) parents

Yesterday my wife had an unsettling argument with my parents which has now caused a divide in the family relationship. This isn’t the first and we’ve always managed to settle previous matters but I feel this is the last straw.

The difficulty in all of this is that we have a little boy (2M) who loves his grandparents but his mother feels it best to limit time with them because of this falling out.

I desperately want everyone to get back on terms but am struggling with ideas. What can I do to help bring the family back together?