have you got a reference for muslims believing that athiests believe in a God? and I'm sure I can find a few examples of how the western civilisation has treated gays and other minorities in their society
Many Imams consider an atheist and polytheist to be synonyms because of scientists like Einstein and Hawking who take the Spinoza view of the universe is God, who creates from itself, who then equate with "Allah" their own version, making them the what's called Mushrik.
An atheist must also pay jizya(poll tax for the polytheists) If a polytheist disagrees, he's an enemy of Muhammad the prophet of Allah, and must be killed for not submitting to the will of it's prophet Muhammad.
It doesn't matter if you can find examples, that's not the prevailing view in the western world and what Islam means is submission (or else) to Allah.
Muhammad makes it very clear that gays are an abomination to Allah, and unlike an unbeliever, you can't pay a jizya as a "people of Lot" the ones who did God (Allah) killed for doing homosexual acts. Therefore many Imams tell their people to do what Allah what did to the people of Lot, and kill them.
A word on atheists:
From this we can learn that atheists too are mushrikiin due to their denial of Prophet Muhammad’s ﷺ prophethood. atheists generally only posit two primary arguments in regards to their beliefs regarding Allah, The Creator of everything:
a)
the filthy atheists allege that the universe is eternal, thereby implying that the universe is its own creator. This is most certainly shirk to call the creation as its own creator, in addition to plain mental retardation, as is the case with the likes of stephen hawking.
b)
the filthy atheists allege that the universe does have a starting point, and does have a creator, but they do not believe in Allah, His Messengers and Islam. As the explanation given in Imam Khazen’s Tafsiir dictates, that too makes them mushrikiin due to their denial of the prophethood of our Master Rasulullah ﷺ.
https://iloveimamrabbani.wordpress.com/tag/atheists-are-also-mushrik/