A long term way to approach such militant atheists is to refer to them with an adjective, “intolerant”.
“The Intolerant Atheists demanded that the poster be taken down, because it demonstrated respect for others.”
“The Intolerant Atheists strongly object to the public display of religious symbols by anyone, anywhere. Much like vampires, such displays cause them burning pain and revulsion. So they seek to have them banned, wherever anyone might be exposed to them.”
BTTT