and you should expect to be treated by your peers and the public according to how you choose to conduct yourself.
If you cannot be a professional and rebute someone in a very matter-of-factly manner and with facts, rather than with juvenile attitude and chest puffing, then you will not be treated nor regarded as a professional and you have no legitimate gripe to being disregarded as immature.
Professionalism and coolheadedness will achieve astounding results in life's conflicts.
If you need an example, look at Johnny Cochran.
You didn't see him flailing his arms in the OJ trial screaming, "This is BS! Come on!! He didnt do it!! He didnt do it, and screw all of you if you think he did!!"