I think there's a lot of potential in the issue of the portrayal of muslims in the media, particularly if you're more passionate about it. The more you care about an issue the easier it'll be to persuade your audience - because you already believe what you're saying.
It we start with "Muslim portrayal in the media must change"
Your three arguments need to be
why it needs to change. Think about the impact of the media, and the power it holds over people. Think about the way people in society treat muslims - there's a lot of conservative rhetoric expounded in the media regarding the treatment of foreign culture and while we allow ourselves freedom of expression these ideologies often result in physical acts of violence against what we perceive to be the "foreign violent Other." Work these ideas into your intro/contention.
So essentially the question is:
What is wrong with the current portrayal of muslims in the media, and why does this need to change?
BODY ONE:
physical/emotional backlash on what is essentially a minority group. it's gotten to the stage where, if you are visibly muslim and you walk down the street, mothers will take their children and cross the road. They will cross back when you've left. They do this because they don't want their sons and daughters walking past terrorists.
emotionally this is really awful and isolating and the media propels this through the connotations of the language they associate with muslim culture. "islam" and "terrorism" are often used interchangeably, and this contributes to the growing demonisation of the religion over all.
BODY TWO:
stereotyping. essentially within the media they shove muslims in three categories:
- oppressed (e.g. unveiling as equal to liberation, uneducated, infantile, in need of saving)
- violent and foreign (e.g muslim men, their violence as a byproduct of their culture, race and religion)
- sexual virulent animals (e.g. i've seen this in literature more often, but it revolves around exoticising foreign culture as something 'uncivilised' and therefore overtly sexual etc)
think about the impact this has not only in the people whose beliefs are warped to suit these models, but on the majority of the public who absorb and then go out and expound this rhetoric. in an international forum this carries a lot of weight, as it results in things like the white saviour phenomenon.
BODY THREE:
what impacts does this have on a global scale? if the media talks about islam/muslims as if they are violent/sexually deviant/oppressed crazy people, how does this further exacerbate existing geopolitical concerns. it allows for the prevalent myth of "western enlightenment" against "foreign ignorance" to historically play itself out once more. people talk about islam as if it's culturally incompatible with western lifestyles (but from some of Australia's flourishing organic communities we know that isn't strictly true) and this allows for continued support in people voicing ideas like the Clash of Civilisations (
http://en.wikipedia.org/wiki/Clash_of_Civilizations)
This is roughly how i'd structure it, but obvs just take ideas you like and run with what you think is good. throughout the speech - if you go with this idea - you'd need to make sure you stick to the concept of "things media is doing -- how these things impact the public -- therefore why this must change" i'd also stick in a couple of sentences here and there about how this can be done. So like, having direct conversations with younger muslims, etc.
ALSOOOOO one final point. if you do this one you need to be technically efficient with your language and make sure there is a certain level of precision in what you're saying, be careful not to make it too explanatory and less argumentative/vice versa. speeches work well in their capacity to allow for the speakers passion and emotion, but you need to ensure that there is logicality and flow in your argument.
i just wanna add one more thing, about nuance: You can’t just say Islam is a culture or an ethnicity without imposing a monotype on hundreds upon hundreds of sub (or subsub) diverse cultures, ethnicities and traditions.
You can’t just say Islam is not intrinsically intertwined with the issue of race without ignoring the way race has and continues to shape the muslim world world (from the spread of it's religious values to imperialism in the context of modern afghanistan.) Islam has become a geopolitical label with a lot of problems and nuances. the media doesn't acknowledge this, it often portrays islam (and the multitude of sub sects it encompasses) as one great big monolithic ideology. this is basically the crux of the central problem with the media and islam.
soooo yea. good luck. SORRY for awful spelling i typed it last night and had a ginormous headache. wanted to post it then but my internet was being dodgy so i couldn't send it now i hope you go with this

goodluck!