No, science isn't a form of religion. In fact, as I've said numerous times before, it's its very antithesis. The principle underlying science--forming ideas based on reason--is the exact opposite of that underlying religion--disregard reason and assume a set of ideas. They're inherently antagonistic.
Now as for people having faith in science, by definition this would require that they haven't done analyses, looked at data, or invested any meaningful level of thought into their decision. In this case, while they may be correct about where they're assigning value, the act of faith is just as repulsive as that seen in a religious context. You should notice, though, that the criticism is about the use of faith, not what it's being applied to. When it comes to religion, they're inseparable, but in the case of science, they're entirely discrete.
This is a very good answer.
I do not know if science is totally antitheist, is rather antagonistic in nature (as you say).
I think in the past people support religious concepts basing on phenomena that had no explanation, and as science began to find explanation to these phenomena many religious people felt attacked. I think that is the origin of the feeling of "antitheist" of science.
Until now the two things that do not have a complete scientific explanation are the origin of life and the origin of the universe (although the explanation for the origin of life is more complete than that which is given to the origin of the universe).
People of religion attributed these phenomena to their religion, but atheists scientists attribute them to something with scientific explanation, even when currently has no logical explanation, they just believe (You can speak about Big Bang Theory as the origin of the universe, but this theory does not really talk about the origin, something went before).
Finally, some people believe in religion, others believe in science, even when science has no explanation for everything, some people just believe that someday it will give an explanation.
I think science involves believing that everything has a logical explanation; but this is not scientifically proven