The picture is of a group of refugees fleeing Spain during the Civil War (1936-1939) crossing into France.
Study the group. Mainly women with a number of children and old men. Few if any men of "military age". Also study their behaviour. They do not riot, loot or wave placards demanding the "right" to enter the UK.
By contrast look at this:-
All young men of military age. Old men? Women? Children? Where are they? Refugees? I think not!!