Hostility always breeds a hostile response. I see this sometimes in otherwise positive places. Instead of "solar power is great", we get "solar power is great, and anyone who says otherwise is a BIG F***ING LIAR WHO CAN ROT IN HELL." Things like that.
My point is, if you find your "positive attitude" contains a bit of "f*** you", then things might be going off the rails a bit. Maybe take a step back, remove the hostility and just present the positive without the attack.
It's a very angry type of attitude. I realise it's coming from a place of frustration, but it really strikes me as unnecessary. Unless you find other people who are angry-excited about the same things you are, you're not going to win anyone over to your cause that way.
Mokalus of Borg
PS - If your "positivity" can't be expressed without hostility, then I don't think you know what positivity is.
PPS - Or you're a very angry person and should seek counselling.