You don't say "Congrats" to a Purple Heart recipient.
A minority opinion I am sure and I am not a PH recipient but I have been in units with over 100 recipients and served four combat deployments in light infantry and artillery units. I think this is overblown. Congratulations isn't the most appropriate word but I have heard it said before and by those in uniform including those who were the recipients of the award themselves to fellow recipients. Having the honor of visiting Wounded Warriors at WRAMC while a commander there really are no adequate words for this award or valor awards.
This is another case of the media and a political agenda looking for controversy.