I don't think a person has to fully subscribe to a party's doctrines in its entirety, to support the FACT that there is a huge migrant problem in Germany and throughout Europe. And it's got nothing to do with your favorite word "racism".
There is a migration problem because of right wingers 'war on terror', which has shown itself through 'interventions' that have destroyed countries. As previously noted, the US dropped 26,000 bombs on 7 Muslim countries in 2016.
That's lead to mass migration, from Syria, Iraq, Afghanistan, Yemen and Somalia, all countries bombed by the US.
Now the right wingers say they need to defend their American (white) values, or so says Bud Plug.
You guys created the problem now you're just adding more wood to the fire, demonizing Muslims for leaving the countries the right wing wanted bombed.
That's help put the neo-nazi Richard Spencer back on the front page and the AFD in seats in Germany.