The study appears to be fragmented or comprised of multiple unrelated essay responses rather than a cohesive paper with a single subject. The text jumps between:

¶ … person's own perception, which of course is based on upbringing, family structure (or lack thereof), religious exposure/thoughts and so forth. When those feelings become entrenched and ingrained, any culture, group or activity that is a clear outlier from that ingrained culture is usually defined as an out-group. A common example would be gay people as viewed by a person raised Catholic or a Buddhist man to someone that is Jewish.

As for what is missing from the Iron Maiden video, it is quite clear that there are no clearly identifying national marks or flags anywhere in the video…not on the soldiers and not anywhere else. This was probably selective editing on the part of who made the video, but it's fairly obvious after watching the video once or twice that it just seems to be men killing each other with no defined purpose.

The only discernible difference between the two fighting sides is the color of their uniforms and the helmets. One side has the knobs on the helmets with brown uniforms and the other side is blue with regular helmets. The only indication, with no context of where this video came from of course (a movie), the only sign that this is a depiction of World War I is the German communique at the very end of the movie which indicates the country and the year and, thus, the war in question.

Question Three

Coming strictly from a legal standpoint, gay marriage should be allowed because, as noted by the question, it is a matter of equal rights and the law and not on the religious beliefs of groups that object to homosexuality on religious grounds. This answer is complicated by the fact that mentions of God pervade the founding documents and the thoughts of the men behind them, but it is also clear when looking at history that the United States was created in large part as a response to the tyranny of Great Britain and a lot that tyranny had to do with religion.

Question Five

As far as how the Thomas Theorem relates to the above, perception drives opinion and of course perception is not always reality. As noted above, people will create racism even when it doesn't obviously or actually exist but the other side of that coin is that bigoted people will try to portend that they are not bigoted. Either way, the consequence and aftermath of either proposition is very real in its consequences, per the Thomas Theorem proving itself to be true. This pattern and path pervades conflict theory, the feminist perspective and other similar theories whose believers will work themselves into a tizzy and thus cause real issues and consequences even if the details and beliefs are misguided or even entirely fabricated. As for Karl Marx, he was very much a believer in the people rising up the rich and powerful which is something else that lends itself to corollaries to the Thomas Theorem as well as conflict, feminist and other similar ideologies.