I have the similar arguments. Fighting though i know i won't change thier mind. I always concluded my reasons of doing so as a vent of my "anger".
I fought with this conspiracy theorist the other day who believed he was "right". he kept telling me these stupid things he got off the internet (a source which could of easily been manufactured by some idiot using photoshop)
i called him illogical and idiotic. He thinks hes so smart, calling us incompetant while he is the most incompetent of us all. Like them, He believes crap just because it disproves what the others believe (ie- thier crap!)- anyway i got off topic.
I view this pointless argument as quite refreshing and healthy actually... i fight to vent my frustrations of these idiots. i might not of gotten through to him but i felt good then, and that's what i believe matters. I just like to express my oppinion and try to make them see the truth...
Otherwise i would be arguing in my head, having to live in annoyance with that idiot behind me. My head would of been so clogged with that idiot, that my mind couldn't further elsewhere. Later i might regret my specticle and such but i love recalling what i said to the idiot...
argh... i'm sorry if i make no sense... your fights could have a different reason.
but alas! i believe you have nothing to fix. your sane to want to fight the idiots.
Sure you might fight with yourself later of why the heck you wasted time on idiots but.... there could be a chance where you did get though. even dr.phil has his day where the idiots listen to him
plus... i think it is best to express your opinion then shelter it inside. Very unhealthy people were formed from not speaking thier mind.