Yes they undoubtedly do to a degree but:
a) It doesn’t excuse racism in any other party.
b) Their leader, however incompetent she is, isn’t intimately associated with a set of views or specific groups that espouse or encourage it and has been on official visits to, and met representatives of, Muslim countries.
c) They don’t believe that Saudi Arabia, Pakistan, Indonesia, Malaysia or other countries where the dominant religion is Islam are inherently racist or apartheid.
d) They don’t appear to believe that there’s an Islamist lobby that seeks to subvert public opinion.
Does that answer the question?
So despite the all the evidence May is just burying her head in the sand because no one like a party donor or weapon buying country has stuck their head above the parapet yet to say that there's an issue.