Is this a normal relationship between brothers?

Ok..heres my story. Is this normal...my in laws are having there 40th wedding anniversary on the 21st of May. That is a month from now. My brother in law called my husband this week and said he wants to throw a big party for them. First he wanted it at the park, catered, the whole shabang. I called around to parks and the catering company and found out that one, theres no parks available because of graduations, and two, its going to cost around $1300. We are supposed to split the cost. we do not have money like that. At all. We struggle to make ends meet half the time. Anyways he called here tonight and said that he had called around as well and all the parks were taken so he wants to do it at a reception hall. My husband asked what do u think thats gonna cost and his brother totally went off, screaming at him saying that we could just buy our cheesey gift certificate and not help out with his parents party and he would just do it all and pay for everything then proceeds to hang up on him. is it normal to be that mad at someone because we financially are not able to put in 1/2 the amount of money of this party? He never even gave a chance anyways, just started screaming about it and hung up. And is it fair to ask for this kind of money 4 weeks before planning something like this? I should mention also that our relationship has been strained with him since he started dating a girl 1 year ago because we do not like her at all. We have had one other blow out but just kind of act like things are ok now and ignore his girlfriend. She is very manipulative and has said sneaky and cruel things to us with out his knowledge..or at least that we dont know that he knows. So please let me know what u think...