Der Spiegel on the aftermath of the Berlin attack:

'But the Christian Social Union (CSU), the Bavarian sister party to Chancellor Angela Merkel's Christian Democratic Union (CDU), was unwilling to spend too much time in mourning. CSU leader Horst Seehofer, always worried that his position could seem too nuanced for his fellow party members, instantly demanded "that we readjust our entire immigration and security policy."'

Read the article here.

This is what too many politicians have in common: they worry that they could seem too nuanced for their voters and their fellow party-members.