In general the charedi public does not understand the non-relgious public. They do not seperate Anti-Religious from non-religious. Most people are non-religious. Anti-relgious are the ones who fight yeshivas and such. Non-religious generally have a live and let live attitude , However they expect the same in return.
Fighting things they like is a losing cause and can turn them into enemies. One always has to pick battles carefully. Picking the wrong battle can backfire.
While the charedi population could care less about Eurovision, it seems many chilonim Do care and there might be backlash if their “fun” is stopped