Butch,
You are right, the discussion of "strong" vs. "weak" atheism and
"atheism" vs. "agnosticism" is jaded. The definitions are subjective
and are more a question of a "feel" rather than fact. I wouldn't use
a special term for your definition simply because I haven't seen
people using it and you would have to explain it anyway. Dawkins uses
"militant atheism" for that purpose which is not a good term either
because of the negative connotation with "militant Islam".
Another term which, I'm sure, you would not like, is "evangelical
atheism" which also has association with Evangelical Christianity.
I'm a theist, by the way. I'm not against atheists and I do admit
that my fellow believers can be a pain in the neck with forcing their
beliefs onto others. I hang out in this forum not to proselytize, but to challenge my own beliefs and, perhaps, help other people understand mine. It's been a highly educational experience so far.
I think that belief "God exists" and belief "God
does not exist" have same foundation - faith based on emotion and
nothing else.
It seems to me that both connotations are quite appropriate. How do
you expect the "anti-theism" be different from Evangelical
Christianity? How do you plan to avoid the danger of turning into
what you are against - proselytizing emotional beliefs and "Religious
bashing and using falsely misinterpreted pictures to replicate the
message over and over?" Some religions do not use "pictures"
altogether (Islam, Puritanism), and some don't have a deity
(Buddhism). Are you against those as well? How do you plan to
succeed without using the methods religions used for centuries? There
is a lot to think about before you set out on that path. There is a
clear danger of ignorant bashing of other people's beliefs.
As for the question, I would say, to actively persuade people that
there is no God, one should believe it first. So, yes, one must be an
atheist to do that. After all, one cannot be a Christian missionary
without believing in Jesus, right? Persuading people to believe what
one does not would be hypocrisy, don't you think?