ORIGINAL: british exil
Although the Kaiser was overjoyed that Hilter had conquered France in such a short time, he hated the Nazi regime. I think he was also appalled that a Bömische Corporal ruled over the Army and Germany.
If I'm not mistaken Wilhelm was still upset that he had to leave Germany and live a simple life in Holland. He never visited Germany at all.
Mat
The moment he would try to enter Germany, Hitler would have him arrested. Also: when the Germans conquered the Netherlands a special unit was gathered to guard the castle of Doorn to prevent him leaving there. Hitler didn't want him anywhere in Germany at all. The Kaiser also made a vow never to return to Germany and even forbid the returning of his remains to Germany if the Monarchy wasn't restored first. That a Bömisches Corporal ruled over Germany was appalling to him, but so was the Weimar Régime or President Hindenburg in his eyes.
You are still right about the Kaiser hating the Nazi Regime. However: there was one very particular statement made in his wishes, regarding his funeral. This has to do with the wreath, but it wasn't the wreath itself that was against his wishes...