In religion slavery is a metaphor. A huge allegory that goes as a synonym for all followers.
Right. So when the Bible spells out who you can enslave, and for how long, and the specific markings you put on them to indicate ownership, and the conditions under which they can be passed down to your children as property, that's metaphor. You should, perhaps, read Exodus 21. It would be fun to get into this further, but I think it would have to be its own thread, as it has little connection to the rest of the topics here.
The two major points is one - equality of chances, and decriminalization and non discrimination. That I agree with completely. The state is not supposed to be an absolute guardian of morality. It's not rational and it's not realistically possible to regulate all human activity. If we have a group of hipsters, let them live as they see fit until they reach maturity.
Ok, so we seem to agree here, more or less.
The second point is allowing LGBT communities to get civil partnerships (domestic partnerships, it's called variously in different countries) and/or full marriage equivalent to traditional families. On this is my fundamental disagreement. The state should not legalize and get involved in normalizing this situation. My argument is that as long we have torture, capital punishment, rape, religious, racial segregation - why do we talk about LGBT? Far as I'm concerned it's a whim.
There is a lot to disagree with here.
1. "The state should not legalize and get involved in normalizing this situation"
The state issues marriage licenses, so clearly they ARE the institution that needs to be involved.
2. "as long we have torture, capital punishment, rape, religious, racial segregation - why do we talk about LGBT?"
You may rank marriage equality as a lower concern than rape or racial segregation without a huge amount of argument, I suspect. But there is a big difference between "X is not as important as Y" and "We can't solve X until we solve Y".
"Sadistic torture is worse than tax evasion, so why do we bother doing anything about tax evasion while we still have people being tortured?" I'm sure you can see the flaw in that argument.
I could only accept more rights for LGBT if they were a humble and righteous community. Not arrogant, hypocrite and ugly as they are at present.
Luckily, we don't establish people's rights based on whether we like their attitude or not.