Well bro we muslims have different standards, for us, fornication, rape, adultery, drinking, clubbing, one night stands is all the same. These things corrupt society as a whole.
You have free will to do what ever you want, but you will be held accountable by God on the day of judgment by whatever you do.
You can kill, steal, cheat and get away with it in this life but you won't get away with it in the next.
The fact that western society has declined on principles and morals does not mean we Muslims have to adopt to what the liberal west wants to propagate.
It's kind of how the west tries not to only impose dictatorships or so called democratic puppet regimes but wants to also impose its liberal values. It just won't fly. We have different values in that sense.
The fact of the matter is, these values are more akin to judaism and christianity that the pop culture of the west has abandoned. So in effect if Christians were God fearing and abiding by religion they would be in fact far closer to Muslims but that is not the case, pop culture and media has changed these standards.
Sleeping around, getting smashed, one night stands have become ritual fun, something to laugh about, joke about, as okay, etc... one step at a time.
Hence to us these things are unacceptable.
As far as things like forced marriages, abuse of women, etc.. these are things that are foreign to Islam but part of some of the backwards preislamic cultures.
For example 'honor killings' have nothing to do with islam and are practiced widely by african and arab christians, hindus, but media focuses on muslims who do it.
Just one example.
Also back to the free will thing, adults have free will to comit adultery, free will to cheat, free will to rob a bank? Where does this free will stop? It's not about 'free will' God gave us free will, that's what Islam teaches us, but also teaches us how to live this life, the actions to do or not to do and the consequences of those actions for a better society or worse off society.