Why did the shoguns decide to isolate japan from other nations in the late 1500s

The shoguns decided to isolate Japan from other nation in the late 1500s because they wanted to discourage revolt against their rule.
At the time, not many people were pleased with shoguns, a military government, and they may have though about an uprising so as to make their living conditions better. However, shoguns had other plans and thus they isolated Japan completely, and to this day, Japan is still probably the most isolated country in the world.

There is nothing inherently wrong with being gay. speaking generally, opposition to gays are usually judged on people's moral basis whether it be religion, experience or other factors. to conclude, there is no objective answer to this question only subjective ones that rely on people's idea of what is right and wrong.