Don't do it. Evolution made your dick as it for a reason. Cutting parts of it off by humans is only due to some spooky believes in some dogmatic stories. If someone really thinks that makes you "unclean" well then he is anyway lost in his dogmatic world.
I would suggest looking for other more open and liberal guys to hang out with.
Enjoy your body as it is 
I am sorry but I totally disagree. Filter criteria are absolutely not "racist". They are only filters helping to narrow down a earch radius based on personal criteria.
If the argument is that the "origin" or "ethnic" filter is racist than how about all the other filters such as cut/uncut; body type; age; weigh;…?
With that argumentation all filters in a search are "racist".
This discussion and "service reduction" of grindr s ridiculous. And it will not solve in any circumstance racist behavior!
Just my two cents...