And some self-described pro-homosexual researchers who uncovered such results attempted to conceal them by declaring that no differences were found.
Do you mean that some of these researchers are biased in favor of pro-homosexual findings? Did they discover some inconvenient truths in their research?
ALL research should be done without pre-conceived notions of what the preferred outcome is. That applies to the study of homosexuality, the study of global warming, the study of single parent families, and any other subject.
Most research is done to test a hypothesis. The researcher USUALLY has some bias relative to that hypothesis. If they don't then they probably wouldn't be doing the research.
The problems come when a researcher falls in love with a hypothesis to the extent that when it is disproved, they ignore the results.
But, what would the junk science community do without all the government grants?