Because this is the proclamation where Washington declared Thanksgiving as a national holiday. The Thanksgiving Proclammation was declared on November 26, 1789
The National Thanksgiving Proclamation was the first formal declaration of thanksgiving day performed by President George Washington on November 26, 1789. The attitude that Washington took towards God in his proclamation was respectful, stating that all nations must acknowledge His providence and "..to obey his will, to be grateful for his benefits, and humbly to implore his protection and favor...".
Being racist towards people doing the jobs that no one else wants to do(racist towards Mexicans, although they are doing the jobs no one else wants to do)