The opposite of a theist is a atheist
All theists. Atheism is the default position; belief in a god must be taught.
Theists in general have not established a common and consistent view on the acceptability of science. In that much science has been done by theists (e.g Gregor Johann Mendel (July 20, 1822 - January 6, 1884) was an Austrian Augustinian monk and a scientist who did his work on genetics) and much mathematical and astronomical work (both these are areas of science) was done by moslems (strong theists) in the middle ages, it is safe to assume that at least some theists are firm believers in science.
Probably Sweden.
Secular
last time my teacher just said their mono. Buddhism is the one that's poly.
This question seems to assume that atheism is a religion; it clearly isn't. It is quite unusual for atheists to become theist, although is does happen. The vast majority of theists inherit their beliefs from their parents during childhood. Other theists have cited "religious" experiences or friendships with theists as reasons for believing.
As Buddhists neither worship or acknowledge a deity they would meet the definition of "atheist" (no god) for many theists. The Buddhist belief in an immortal part (similar to the Christian concept of soul) would make many atheists wonder if they weren't more like theists. The Buddhists may fall into a different category than the simplistic theist/atheist dichotomy. They may be non-theists.
Buddhists are non-theists. God(s) have no role to play in the path to enlightenment.
Veganism has no official stance on religion. Vegans can be theists, agnostics, or atheists.
No because neither of them can really prove that the other is wrong. Atheists say that a higher power can be disproved just as easily as Theists say that a higher power can be proved to exist.Answer:Atheists usually rely on facts and reason to state their position. Theists generally fall back on fallacious arguments. In an argument about the existence of something the proponent has to prove it, the opposite view does not have to prove the nonexistence of the position. This is demonstrated in Carl Sagan's example of discussing the presence of a dragon in his neighbours garage.
Atheists do not believe in any gods or deities, while theists believe in one or more gods or deities. Atheists typically rely on reason, evidence, and science to form their beliefs, while theists often base their beliefs on faith and religious scriptures.
Any of the above I would think, but I've met some who were deists.