You miss my point. If a person does not love his fellow Christians nor his church enough to give, then perhaps they should look for a place where they can love enough to give ... and it indicates what that person really believes is important ... IMHO.
Frankly, I believe a person's giving shows where their heart is and what that heart really loves. Where a person's heart is that is where they will put their money.
Are we told to love one another? Yes, we are and one way of loving is to help others by giving.
Frankly, I have found in my life that I cannot afford not to tithe. I see the 10% as a minimum and that giving really begins only above the tithe. But, that is me and my decision. Does God reward the cheerful giver? I think so, but not always in material ways.
The tithe teaches us that we can live on 90% and giving more shows us that we can live on less than 90%. I do have firm financial rules I live by and they have served me well ... at least I think so.
So I would say that Christ does not teach a tithe. He teaches more than a tithe.