Some would argue that the use of the word gammon politically is a rather mild one considering how those insulted by it view the world .It seems safe to say that someone who is referred to as gammon, would not be best pleased, and may find it very difficult to calm down due to an increase in their blood pressure.It should also be noted though that 'gammon' is not a racial slur, actually gammons come in all races and sexes, take Katie Hopkins for instance.
It is the latest in a long and (in)glorious line of political insults leading back to Aristphanes, to Nye Bevan that have sparked a thousand angry responses ever since. Annosh Chakelian of The News Stateman traced the first use of "gammon" back to Times columnist Caitlin Moran, who described former prime minister David Cameron as a "C-3PO made of ham" and a slightly camp gammon robot" Alas , this would not be the last time Mr Cameron would find his name unfavourably connected with a dead pig. One can also traced the coinage even further, noting that Charles Dickens employed it in the pages of Nicholas Nikleby (1839)
All this name calling I guess can get rather childish though, think i'd best stick to being a snowflake, win my arguments in a more subtle way, otherwise I might find myself beating a hasty retreat from an impeding wall of gammon.