I think that was an utterly stupid and nasty comment.
Absent any clarifying context to Jack's statement, I don't think your conclusion is warranted.
I don't wear one, because wearing a poppy is glorification of wars which should never have been fought.
I don't wear one because all my poppies are invested in opium production.
But seriously--
1. While wearing a poppy could be "glorification of war", it needn't be, depending on the wearer's intent-- could signify that the wearer is honoring the fallen soldiers, whether or not they think the war was justified.
2. What do you mean by "wars which should never have been fought"? Do you mean the UK should not have intervened in any conflicts, inclusive of WWII?
Because, what ever their reasons for joining, their fighting and their sacrifice helped contribute to us having some of the freedoms we have today.. Especially in WW2. It is also good that we remember them to remind ourselves where having idiot rulers could lead to..
When history is forgotten it is likely that it will be repeated. It was bad that they had to go, lets not make it worse by forgetting them and the lessons the survivors learned.
While I definitely agree with you on WWII, it's certainly arguable that UK's participation in WWI and other international conflicts caused more harm than good-- not sure I buy that argument, but I wouldn't dismiss it out of hand either-- I think a strong case can be made that Allied defeat in WWI would have been preferable as it would have prevented the rise of the Nazis and the much worse horror they inflicted, would have prevented the creation of the Soviet Empire, and possibly would have led to better social development in the Middle East without post-WWI colonialism or Cold War politics interfering in the region's affairs. And I'm anything but convinced that Britain's other wars or military interventions since WWI (excepting WWII) were for the good or liberty of anyone.