I wouldn't say that...you never know these days. My dad told of how he took somebody that wanted to convert to Islam to a mosque and the people in that mosque didn't even seem to care. He ended up having to take him to another one.

Point is, if the first experience you have in a mosque is negative, don't assume that all mosques are like that. Don't let bad attitudes displayed by any muslim put you off Islam, because really, muslims are by no means perfect.

May Allah make things easy for you and your friend, ameen.