There, I’ll take issue with you – they’re different species, the greys are an artificially introduced, invasive species that carry a disease that is harmful to our native red squirrels.
Thats fine, but they are a little furry critter and lets be honest, they may well be replacing the other little furry critter, but they aren’t f*****g up the planet, so in the grand scheme of things have more right to survive that the entire human race, which are F*****g up the planet.
Then theres the other thing. Nature – The strong survive.
Im sure int he course of history other furry or feathered or scaly creatures got here and went on to replace the other similar species which were.
Some examples
The cat
Fallow Deer
Rats, both brown and black
European bunnies – often kept as -pets here in the UK
Feral goats
Lets not forget us, whom apparently have only been on these islands for a mere 40,000 years.
And no doubt plenty more besides, have swam in, flown in or jumped ship.