They know there will be backlash, infact they WANT violence to be perpetrated against them. They need the LQBTQ("AI" also now? Haha) to look like victims to gain more support. Then they can enact more anti-hate laws and be able to justify the "violent right extremist republicans" narrative.

Also the establishments that host these events don't care too much, they are being paid a lot of money. They will be compensated for the potential losses due to backlash. Hopefully they got paid enough, people are really starting to get upset with these events targeting children.