Mihaylov called upon Uefa to sanction England if they went against its protocols and he did not hide his anger.
Abraham said the players have decided they will take matters into their own hands if necessary.
Silhavy, who team crashed 5-0 at Wembley and a Raheem Sterling hat-trick in February, said: "We saw that England players are not flawless at Southampton - and we hope that we can take advantage of that".
The team plays against the Czech Republic on Friday before facing Bulgaria on Monday in a partially empty stadium - a punishment for Bulgarian supporters' racist behavior earlier this year. So, we've got really good players, we need more than three. "I personally find these comments [from Southgate] offensive due to the unjust branding of the local spectators as people inclined to discriminatory behaviour", Mihaylov said.
"We are not trying to create a situation at all, far from it".
'You know, a lot of the players, I'd say every single player, and the manager, all want to go into tournaments with the thought of winning it.
The England squad held a meeting to discuss UEFA's three step plans, though Abraham has revealed that Southgate's side will decide amongst themselves how to combat any potential abuse. We are very clear on that.More news: Two men linked to Rudy Giuliani arrested on campaign-finance violations
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"At this moment in time, we have to have full faith in UEFA".
'Harry is one the best strikers in the world and there are parts of his game I can add to mine'. He wants the focus to be on the game, on his players expressing themselves and, hopefully, revelling in the thrill of qualifying.
"What I've got to do is provide a secure, safe environment for them to play".
England stars have agreed to walk off the pitch and abandon the game should they receive racist abuse from the stands in their upcoming internationals.
"If it happens to one of us, it happens to all of us", Abraham said.
England have maximum points from their four qualifiers and victory in Prague on Friday will confirm qualification for Euro 2020.