Why was the location of Mekkah ideal for the spread of ideas?

Mecca was a place of pilgrimage since Abraham built the Ka'ba. ... Allah wanted to remove idols from Ka'ba, as it's a sacred place. Jews gathered in Medina with a hope that a prophet will rise there, who will return Jerusalem to them. And Christians were there too.

in 1989, tiananmen square in beijing was the site of china’s main industries. china’s government headquarters. -pro-democracy demonstrations. (second choice)

during world war ii