Is AUTHOR wrong in the post ? POST : Am I the asshole 

So to give some context my parents before meeting and having me had kids. My mom had two daughters and my dad had three sons then they got divorced met each other and had me.

My father passed away when I was nine he fought with an illness for a long time. My mother was physically disabled, she was in a wheelchair so growing up I was her caregiver, she was abusive and we lived on disability. Growing up my siblings have always lived on the other side of the country along with the rest of my distant family so I feel disconnected from them, there is roughly an 20year age gap between me and them. 
In grade nine our house was destroyed by a storm and lack of upkeep so it was deemed unlivable. We were homeless for a while until an organization simmilar habitat for humanity offered to build us a house. Their main goal was that I would have a place to live, which is why so many people donated. During the build my mom got sicker, we lived in the house for two months before she passed away. None of them came to the funeral or to visit when she was dying one only came afterwards to go through stuff and take what they wanted. In the will my siblings got a little bit of money(not that much since we were broke) and the house was suppose to go to me since it was built for me and my mom. Since I was not done high school I didn't want to live by myself so I rented out the place to someone with a disability since it was designed for wheelchairs. And I used the funds to help pay for my education, even though it took a long time I am now a proud RN. The person who was suppose to take care of the will died so the house never got put into my name. 

It's now been five years during that time my siblings never said anything about it. I'm done school and I feel ready for the responsibility of the house. So in December I told them that I was working towards getting the house transferred into my name as it should have been done, and they are furious at me saying that it should be divided amongst all of us. One of my brothers is even calling me an awful person, saying that I'm being manipulative and "how could I betray them like this". Apparently my mom lied and said that the house would be divided equally amongst the siblings but then wrote that only I would get it in the will, which doesn't surprise me as she was a horrible person. I'm the type of person who hates confrontation and this situation is stressing me out. Even though I dont really know them I dont want them to hate me. 

Am I the asshole for trying to get what's written as mine in the will? 

Tldr; my mom died 5 years ago and my siblings are all 20ish years older than me got little in the will and are mad that I'm trying to claim the house that is written to go to me. 