It's not easy to decide either way. I recently advised a women's rights organization in a similar matter: they were poised to publish a scathing (and somewhat stupid) indictment of islam with regards to women's rights. It's obviously a minefield, with popular opinion divided almost equally.
You have to judge the intensity of emotions it will cause in people, the propensity of people to act on those emotions and the base desirability of the different groups.
In this case, they rightly passed on the 'opportunity' because it seemed as if the people who would agree were unlikely to donate to women's rights in the first place (and vice-versa).
(And because their employees threatened to collectively quit)
I just tried to look up statistics and the results mostly depend on the wording. "Afraid of islamic radicalization": 53:47, "Islam part of Germany":37:60, "Muslims can be German": 70:30 etc.
You have to judge the intensity of emotions it will cause in people, the propensity of people to act on those emotions and the base desirability of the different groups.
In this case, they rightly passed on the 'opportunity' because it seemed as if the people who would agree were unlikely to donate to women's rights in the first place (and vice-versa).
(And because their employees threatened to collectively quit)