Firstly, homosexual behavior is always grave sin that cannot be mitigated through the sacrilege of homosexual marriage which actually compounds its transgression. Period.
But masturbation is not. Between married people, mutual masturbation is not. Read the Song of Solomon. It's also not for a single person when unaccompanied by sin and sinful thoughts.
Pornography is always sin, however. And many genuine Christians are presently addicted to masturbating to it which certainly is sinful. You are correct about that.
Genuine Christians, churches, and organizations continue to stand against both homosexuality and pornography as outside of God's holiness and design for human sexuality.
You've confused an immoral generation's acceptance of both homosexuality and pornography as a false charge against Christians that they are against homosexuality but not against pornography and that simply is not true. We've always been against both (and instead for God's design).
Your own apathy and involvement in the ongoing fight against pornography, combined with the mainstream media's refusal to cover it at present, has led you to make a false assertion. Every Christian organization and association I belong to is actively involved in opposing pornography.
From the my local church, to its associations, to para-church organizations like Family Research Council and Morality in Media, to Christian organs like Focus on the Family: they are all actively opposing pornography socially and politically including locally and at the state and federal level. You are wrong.
And, as stated before (and you lack understanding on this point), though all sin separates one from Holy God without repentance and the appropriation of Christ; God is just and fair so it's no surprise that the Bible teaches sin gradients.
The Mosaic Law itself which formed the core of the old covenant God had with the ancient nation of Israel is a perfect example; however, the New Testament itself is replete with them including Jesus Himself telling Pilate in John 19:11 "therefore he that delivered me to you has the greater sin."
Scripture clearly reveals that in God's estimate some sins are worse and bring greater guilt than others, and that some sins do us more damage. So while all sin separates one from Holy God outside of repentance and the appropriation of Christ, justice acknowledges that sin gradients. The sin of murder, for example, is actually worse than say taking a pencil from work without asking.
This is important to understand when it comes to any discussion regarding the socio-historical treatment of homosexuality for, as I previously stated, societal/civilization embrace of homosexuality and homosexual "marriage" is the beginning of that society or civilization's bottom that ultimately results in judgment and replacement. Additionally, there is a prophetic element involved when what we're seeing occur, occurs.
Obviously, this simply is not true say for masturbation. You do not appear to grasp the magnitude of what's occurring in the civilization you live in nor where it's headed. Your thinking is flawed, your logic is faulty, and your feelings culture directed. Not wholly, of course, but partly... enough that it's led you to make post after post after post in this thread that doesn't align well with reality.
Okay so we want to put secuality on a different level on sins. Okay. Where's all the uproar then on masturbation and pornography? Both damage a person's purity. I'm not seeing an equal pounding my fist on the table, stomping my feet on the ground, yelling "I'm not going to take if anymore" posts and threads like I am seeing with homosexuality. Can't pick and choose sin you want to gripe about. It's all or none.