"some claim left wing politics are associated with not knowing the value of controlled national boundaries "
because the vast majority of the left seem unaware of the damage to the country their open door policies have and do...
loss of national identity, loss of culture etc etc...
the left hide away in a little bubble and wear rose tinted specs and think its ok to hand over our country to for the most part people who will turn the place into exactly what they have left behind, because collectively they havent got the nous to do anything about it, but come here where its handed to them on a plate and we have to bow down and bend over to accommodate them and their requirements...
and if you want to protect your country and its ways, identity etc they will then try and stigmatise you with all the insults they know, like racist, xenophobic, knuckledragger etc....