You're confusing political belief with scientific opinion. There is nothing wrong with nearly everyone holding one scientific opinion. I would say there is something wrong with a lack of diversity (political or otherwise).
False equivalence in scientific opinion isn't any different from the political sphere, its just that many political issues are actually more highly debated because of a lack of hard science behind them.
Further, still a flawed argument; part of the main point of science is to consider questions that may be emotionally loaded or painful in a scientific manner. Forbidding certain streams of thought because it could conceivably be used to support a politically unpopular position is unscientific. At the very least you ought to acknowledge that is the case, rather than try to pretend that you have not somehow left science behind, and pretend that you will suffer no consequences from that because of the sheer, self-evident rightness of your beliefs. (And if those last six words don't at least make you pause, you don't have a scientific mind.)
However political beliefs are a combination of values and factual beliefs. For example, consider gun control. Part of the debate is a value debate on who has the responsibility of protecting the people (if you believe that it is the government's responsibility, you are less likely to be pro gun than if you believe it is an individuals responsibility). However, there is also a factual debate on if private ownership of guns actually protects people.