What influences male US Culture?

It is apparent throughout a range of questions that many US males are continually trying to show how manly they are. This is often through denigrating the freedom of others to live as they wish and also, frequently using homophobic and racist hate speech. This is in contrast to US females who are generally very open minded and more likely to live and let live.

What causes this extreme cultural gap?

What influences male US Culture?
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