It isn’t just that Muslims are unfriendly, it’s that Islam commands them to be rude to the filthy kuffar (disbelievers)

A Muslim will never greet a (kafir) first. Instead, he will try to get you to greet him first in the belief that in doing so, you have taken a step closer toward the religion of the paedophile prophet Mohammed.

 Qur’an 9:5

“When the sacred forbidden months for fighting are past, fight and kill the disbelievers (kuffar) wherever you find them, take them captive, torture them, and lie in wait and ambush them using every stratagem of war.”