I don't think it was ever trolling. There is an overt hatred for Jews by many members of these forums, which some try to hide under the guise of 'trolling.' Misspelling your sentences and adding "srs," "k," and "lul" at random intervals does not constitute a valid excuse for racial slurs.
EDIT: An example, for your convenience:
http://community.boredofstudies.org...942/where-islam-threads-gone.html#post4382175
EDIT: An example, for your convenience:
http://community.boredofstudies.org...942/where-islam-threads-gone.html#post4382175