What do they mean by don't politicize?

I really dont understand! What do they mean by don't politicize the issue. I'm referring to the recent shoe throwing incident.

The leader who was assassinated was a politician. The person(s) who were accused of spearheading the massacre of a community are politicians. It is a political party that is accused of being insensitive. The shoe was thrown at a politician, that too, a minister. The person who threw the shoe was a political analyst!

I really dont understand! What do they mean by don't politicize the issue!