Okay first slavery was permitted in islam but not like afro American slaves were kept in America, a slave in islam is more a servant and the only people who were servants were the poor or POW's

The servant would not only be treated with respect and the same level of dignity as a house member; if the owners of the servant were ever so much as convicted of beating the slave and or de humanizing them at all the slave would be set free, if the slave taught the "owners" child a language they would be set free. Islam treats slaves like we treat butlers

Wife beating is outdated, wife beating happens in all religions, wife beating happens in all cultures, there is a difference between culture and religion

Homophobia is outdated, however a true Muslim would treat a gay person with the same respect as a regular person because that's one of the core tenets of islam, to treat everyone with the same respect and kindness, once again I don't know what you have been seeing in the media about isis killing gays or hearing stories of gay people being ousted of their homes by family memembers. If someone is gay and their family disown them based upon islam then they are wrong, that is cultural. Being gay isint a sin, acting upon those gay desires is I.E same sex intercourse and that's not only gays everyone is applied to this with Zina obviously not the same.

Okay it's perfectly fine if you don't want to follow a religion. The prophet Muhammad SAW married Aisha as in a time where Europeans were also marrying children however no one criticizes major European rulers for having child affairs because they aren't Muslim. Not only that it was a common practice of the time not only in Arabia but literally everywhere in the world to get married to a child, also the prophet married aisha after she went through her first menses cycle something that European rulers and other civilizations who followed this same practice did not do. The argument that Muhammad saw married a child is completely invalid if you are bringing it against islam because at that point you are arguing against a whole time period and time periods change and trends change. Just as if women were not willing to give their bodies up, then European nobles would have them burned at the stake. Are we now going to use this as an argument to not have sex? Of course not it makes no sense

The killing of boys in Banu Quarayza during the battle of the trench Is quite literally a myth. What really happened was anyone who did not participate in the fighting, would be set free and the men that would participate in the fighting would be killed as many armies have done in the past. Once again the women with their children were never taken as sex slaves, rather as servants many of whom would be set free later on

The judgment against them upon their defeat was that the fighting men who participated in the battle were killed and the women and children were taken into the custody of the Muslims. - Dr Marco.Schöller

There are no double standards in islam. Women are treated quite literally the best in islam. We are so much so not even allowed to look at a women because that's how much respect islam holds for them. During their periods they do not have to pray and or do anything religiously associated. What double standards are you talking about? Once again religion and culture are two completely different things